Of course, the higher bitrate, video quality and audio quality will benefit those of us on 1080p sets as well.
As cool as 4K televisions are, the lack of content for them is a bit disappointing. Sure, they upscale, but upscaling to 4K and watching native 4K are two different things. Sony has a 4K distribution network planned, but they've also created an initiative that will help things along for those that prefer physical media, or who may upgrade in the future.
Sony is going to be releasing Blu-rays with higher bitrates, better audio quality and higher video quality and they're calling them Mastered in 4K. What that tag means is that movies like 'Taxi Driver,' 'The Karate Kid' and 'The Amazing Spider-Man' will all be sourced from the original 4K masters and given expanded color range to more accurately match the original source.
This is going to make Blu-rays look better for those of us using 1080p sets, but also for those upscaling to 4K. Sony says that this is going to get you as close as you can get to native 4K when upscaling.