They're solving it for the future, sure. According to SteamDB I currently have 269 products in my Steam account of which only 78 are compatible with Linux; I do

They're solving it for the future, sure. According to SteamDB I currently have 269 products in my Steam account of which only 78 are compatible with Linux; I doubt the majority of the rest will ever be ported to run on SteamOS/Linux. Also, not every developer/publisher has - or is willing to commit - the resources to release their games on Linux/SteamOS. It's difficult enough to release a game for Windows that runs reliably on the multitude of hardware configurations out there. Duplicating that effort to release on another OS is a massive undertaking for some.