At $2K, the new Kaleidescape Strato M Movie Player is the brand’s least expensive device that can act as a standalone player or be part of a multi-zone Kaleidescape system but not in 4K resolution!
www.audioholics.com
I agree with Kaleidescape that downscaled 4K to 2K can look extremely good.
And, a machine that can do this on the fly is one hell of a powerful little machine !
I've been experimenting with this myself on my new PC with Intel CPU/GPU, that is an encoding beast.
I take a 4K remux and downscale it to 2K with the x265 10bit Intel QSV codec.
I sometimes use filters if needed/wanted. (I do all this in VidCoder)
Using around a 30mb bitrate (thats real high for 2K in x265) takes about 20 minutes for a two hour movie.
My old PC would have taken two days to do this !
Playing these files back on my Dune HD player yields fantastic results ! (and saves a lot of drive space)