If your graphics card can display at 4K resolution, you'll probably love it. And, if your graphic card supports it, then you probably also have HDMI video output capability as well. That said, there is a reasonability issue at hand. If you're going to try to get 4K's worth of real estate (3840 x 2160 in the TV world), then a small-size 4K TV will probably also mean using a magnifying glass to see the details. :-) 4K TV's are a joy to watch when they're filling up a lot of physical size (e.g. larger TV's) with their ample pixels. So, consider both the size of the 4K TV and the output of your video card. For instance, a newer 15" MacBook Pro with their "Retina" display natively outputs at 2880 x 1800 which, although not filling the entirety of the 4K capabilities, looks fan-freaking-tastic on a 4K TV. And, while the Retina display provides beautiful clarity on a 15" screen, there's no way I could work at that resolution and still see anything I'm working on, which means that that same resolution on a large external screen would be a joy ... you know ... if I could scoot back far enough to feel like I wasn't working at an iMAX theater.
