There isn't a whole lot to go on so far with just a single web page saying this is all happening in the Winter. So, now is the time for speculation. Which games will we see appear on there? I'd assume we'll get Death Smiles, probably a Dodonpachi, maybe a Mushihimesama, and what about Akai Katana? I'm sure a lot of people would kill to see Ketsui come to Steam. On top of this, if the initial batch of games do well, will Cave consider porting some of their older titles? It would be nice to see Espgaluda, Dangun Feveron, or Progear get release, though with some of those games, they had outside publishers like Atlus or Capcom, so I'm not sure who owns the rights to the games and if any sort of legal wrangling would be in order if they were to get ported to PC.
In any case, something shump fans on the PC have wanted for a very long time is finally about to come to fruition. It took a while, but it's better late than never. All we can do now is wait and guess which games will get released first.