Early adopters beware...I would be careful in spending excess dollars on 4k / UHD right now. 4K resolution itself is nice, but the real game changer will be when the new colour gamut and high dynamic range (HDR) standards are widely adopted. The new UHD Bluray should ship by the end of the year. It has these standards and with proper implementation, it will give a stunning picture on a TV that has the same colour and HDR standards built in.
The key thing is both the bluray and the TV have to have the same standard built in. There still is not a nailed down standard for HDR so some of the current Samsungs who market as HDR ready Tv's might not be so 'ready' in a couple of years.
My advice to my clients, who want purchase a new tv, is to either hold off for a least a year or two (if they can), or purchase a nice quality 1080p set (or a cheaper 4k set). I would highly recommend they avoid the SUHD series from Samsung, as they are expensive, and there is no guarantee right now that they will be completely compatible going forward.
Here are a couple of relevant articles who those who are interested:
http://www.streamingmedia.com/Articl...5068&PageNum=1
http://www.streamingmedia.com/Articl...ink-97544.aspx