I know we already have Moonlight built-in on Recalbox, but this piece of software would also be awesome to have(if possible, of course).
For those who are unaware of the situation, Valve has recently killed Steam Link, their little hardware to steam PC games to your TV.
What nobody expected is that Valve would release a binary client that will replace Steam Link: Steam Link now in BETA on Raspberry Pi. They have even created a Raspberry specific forum.
I don't have the knowledge to implement this, but I will test the same way I did with Moonlight features :)