With video on a TV, the difference between 4K/UHD and 1080p/HD resolution is really hard to see.
If you want the best picture quality in an LCD next year, you may have to buy a 4K TV anyway.
Despite the lack of content, 4K TVs will get inexpensive and popular very quickly.
4K TVs won't make 1080p TVs obsolete anytime soon.
Read the full story, which reviews some 4K TVs, here: http://reviews.cnet.com/8301-33199_7-57610862-221/four-4k-tv-facts-you-must-know/