I'm happy to report that The Comeback King will be released on 11 August at 12 noon GMT (well, BST to be precise).
This has been a long, long road (not as long as GTA VI's, of course, but y'know) so it'll be great to see the game fully live on Steam.
There's still time to wishlist it before launch day!
STEAM MACHINE UPDATE:
I'm now the proud owner of the new Steam Machine. It's a great piece of kit. Yes, too expensive, but great nonetheless.
And yes, The Comeback King works on the Steam Machine! It works really well, in fact.
There are full instructions on how to install the game on SteamOS in the Community area of the game on Steam. This includes how to avoid the dreaded Web2View download on a Linux box!