Comment by Pulcinella

The hardware 3D audio acceleration (basically fancy HRTFs) is also really cool, but almost no 3rd party games use it.

I've had issues with Xbox instant resume. Lots of "your save file has changed since the last time you played, so we have to close the game and relaunch" issues. Even when the game was suspended an hour earlier. I assume it's just cloud save time sync issues where the cloud save looks newer because it has a timestamp 2 seconds after the local one. Doesn't fill me with confidence, though.