[jvanderbot]

Furthermore, it will log in and unlock your host pc. If you're across town at a coffee shop and your 4 year old kids are near the host pc and see it unlock and start playing a game, you better believe they're gonna wreck your save file.

Not to mention greater security concerns.

[JeremyNT]

Yep, it's really only an option for a dedicated gaming PC (or a VM with the the GPU passed into it).