UHD4k, Curved UHD TV, 3d TV, Blue Ray 3D all at a nascent stage. though its commercially produced & distributed but it will still take some time for these technology to build substantial base get popular among masses. The only breakthrough with developer got in TV technology was launch of HDTV CES in the year 1998 it took good 10 to 12 years since then to get the technology evolved and get commercially viable & popular.
Following technology has been launched in CES & my personal rating of the success rate
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Videocassette recorder (VCR), 1970- Very Successful – Dominated 80 & 90 era
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So buying a UHD can burn a big hole in your pocket both in terms of hardware & software rather being a early adopter we should wait patiently for the technology to stabilize & develop an ecosystem which is commercially viable.