Actually, just like on the 360, not all these games have demo modes...
Huh? All (80-90?) downloadable games on the 360 have a demo mode. You can download any game from XBLM without paying for it and play it. It automatically starts in demo mode. If you like it, you pay for it and it unlocks (you don't have to download a full version or something).
Agreed. And it's even better in games.
Yup.
Enjoy! Hope you like it.
Cheers and no doubt.