Apparently, there is a electric sheep HD client ( e.g. 720p, 1080p, 4k, 8k) in the works.
Example video.
Might add, that this client merits your own rendering for the network.
The original version has a “pay to win option”, on the other hand, it is possible to download already rendered flocks. Only place I have found so far is this (it says 200GB “on the tin”)