As of March 2007, Sharp, the TV distributor, currently has a prototype of a 64-inch TV with a Resolution of about 4000x2000 Pixels, which is equivalent to 8.8 megapixels.
To compare, a 1080p TV has a resolution of 2 megapixels so this new prototype blows a current generation HDTV out of the water.
There are hopes that this new definition will be commericialized in the next 5 years.