The document also states that Xbox chief Phil Spencer meets with Valve's Gabe Newell occasionally.
lol. Handheld isn't my thing either, but it's Valve. I trust the Gaben.
The key difference being that the Vita was reliant on a specific game format. Even if they dropped specific support, you should still be able to update the OS and download games from Steam, assuming the hardware can handle the requirements.Looks uncomfortable.
I see this ending up in a similar situation to the Vita