Our 4K UHD Smart TV buyers’ guide and roundup: Shopping advice plus hands-on reviews

UHD, Ultra High Definition, 3840×2160 resolution, 2160p, 4K if you must (it’s a misnomer, as 4K is 4096, not 3840). Whatever you choose to call it, it’s the new standard for TVs and video content; though truth be known, there’s precious little of the latter. Nonetheless, Ultra HD TVs are flooding stores, and they’ve fallen so far