New wave of 4K TVs offers picture four times sharper than HD . The knock so far has been that there 's not very much content out there yet that can actually take advantage of 4K 's higher-def display . Sony is already on the market with a 84-inch model for $ 25,000 . Comment: LG , Sharp , Panasonic , Sony and Samsung all have sets in the works .
New wave of 4K TVs offers picture four times sharper than HD . Sony is already on the market with a 84-inch model for $ 25,000 . Comment: LG , Sharp , Panasonic , Sony and Samsung all have sets in the works .