While not programming is being broadcast in UHD (4K) you would be better served long term by adopting this technology now rather than having to update again in a few years.
We just picked up the Samsung 60" SUHD 4K LED Smart unit and the picture is really nice! I am now finding out to obtain the full use of the 4K, I may need to update my HD Directv box?
Anyway, from our 9 year old 50" Sony HD to this, it is really noticeable, and hopefully we get nine or ten years out of this unit!