Next Xbox - No Disc Drive?

[Vic]

But I don't think games from Valve itself has DRM. I've got GMod, and as far as I know I could go into any internet cafe and clog up all the hard drives by downloading it on each PC.

Valve Games got DRM, it's called Steam.

Think about it, you may download GMod on god knows how many PCs, but you won't be able to launch it without a valid Steam account which has said game purchased.