A known leaker and SteamVR data miner named Bradley Lynch reports that Valve is working on an Android emulator. Lynch has spotted five apps in a package on SteamDB, with two of them displaying new artwork that references Waydroid, an open-source and free Android emulator.
Maybe a start for their own Android store? And later an iOS store perhaps? (Although that’s an entire different can of worms, regulations and apples)