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OK. But as a trader, 4K isn't useful unless the size is 40", so that there is no DPI scaling. At 27" you'll have massive scaling, it's a waste of money and depending on your charting platform you may even have major problems (not all applications support scaling correctly).
You could have bought a normal 27" panel, and saved some cash.
Depends how old the GPU is in your laptop. Find out the exact make/model of the GPU and post it here, or you can just do a google search for the specifications and see if it supports 3840x2160.
I am currently looking at two possibilities. On of my hopes is to have a setup that I can take with me on planes when I travel, as I am a digital nomad. The 40 inch Philips BDM4065UC would be great, but would probably require a custom bag(the monitor is 35.6 x 20.2 x 3.5 inches.) The weight is great for the screen real estate at 18.7 pounds without the stand. The resolution is 3840 x 2160 @ 60Hz. The other option is using two 34" 2k monitors at 3440x1440 resolution. That would combine for 3440x2880. It would probably weigh more, but easier to pack and possibly carry on. Thoughts? My ultimate goal is to live in 4-5 places or countries a year.
I use a 55 inch 4K monitor that way the scaling size is the same as a 27 inch 1920x1080 monitor and I have the real estate of 4 27 inch monitors, therefore eliminating the need of having so many monitors.
8.5 Kg + laptop(s) + weight of hard case for monitor + power extension cable + 5m network cable (useful) + .....
In Colombia one has to fly between cities so I'm used to lugging my kit around since I moved here.
Until they invent a battery powered laser short-throw 4k pocket projector this works really well for me. No way would I put my work equipment into the hold (will it be on the carousel?) so I travel with 2 light laptops (I use simultaneously) and usually three Asus MB168B+ 1920x1080 USB powered displays I got a year ago. All as hand luggage. They are amazing and run perfectly off USB 2 also. I own 4 of them.
I'd like the IPS display but the older TN screens are better than expected when I ordered them so I'm not bothered. Someone said the older 168+ TN display is brighter than the but I have the 168s set to 70% and that is more than enough.
A few aluminium brackets to clip around the edges hold them up + the Asus supplied cases and its perfect for me. I can just rotate to portrait in a second too. Edge of table though as one USB connector needs clearance but placing on a phone book works. With 2 USB screens per laptop I can run for about an hour on battery, again handy when Wifi or 4G is ok and you want to set up on an available table but can't string a power lead.
Thanks! I may well try this with my LG 49" 4k TV.. from a quick inspection.. looks like it might work. That glass is annoying me. Its nearly a year old and I was considering replacing just to get away from the glare in my new temporary place.
I don't play games so I have no need for a super GPU. I use my Chicago based server cluster for heavy number-crunching. Should be a perfect solution to get 4k running properly off my two older laptops. I expect it will be fine even using USB2 (one laptop is) for Ninja. 4k full screen video playback would of course be clunky with USB2 however NT charts barely use any bandwidth by comparison with video.
I got the Philips BDM4065 40" 4K monitor yesterday. Set it up with my existing Radeon R9 270 using DP 1.2 @60 Hz. The AMD Catalyst Control center software, up until last year, had a feature called HydraVision (HydraGrid) that enabled desktop management. It allowed creating virtual desktops so my goal was to create 4 virtual desktops so that I have an equivalent of the look and feel of 4 individual 1920x1080 monitors. I was surprised to find that HydraVision has been discontinued and has achieved EOL. I could install an older version and get HydraVision to work but I do not want to depend on something that has no more support from AMD. AMD has focused on Eyefinity since which is geared more towards gaming and combining many displays to work as one but there are no desktop management features in the newer versions of their software.
So, after spending the majority of the day researching, I found that NVIDIA's quadro and NVS lines come with their nView sortware that basically does what I am looking for. I will either buy the NVS 810 or 510 once I verify they can support DP 1.2 @ 60 Hz and try to set this up. My ultimate goal is to have 2 or possibly 3 of these monitors which basically would be an equivalent of having 8-12 virtual 1920x1080 desktops.
Large 4K monitors are an appealing idea but not for me. I sometimes trade by remotely logging into my desktop from the tablet. Remote desktop software like splashtop or teamviewer present the entire desktop on the tablet and they allow switching between the monitors. Even though the tablet is only 8" (for convenience) viewing the entire desktop on it is not bad at all. With a large 4K screen, I would be panning and zooming all the time.
this works really well for me. No way would I put my work equipment into the hold (will it be on the carousel?) so I travel with 2 light laptops (I use simultaneously) and usually three Asus MB168B+ 1920x1080 USB powered displays I got a year ago. All as hand luggage. They are amazing and run perfectly off USB 2 also. I own 4 of them. 
