I'm almost positive that I heard that there will be an option to switch between the two dashs.
As for being able to copy the game to the disc, MS has said that it will improve some games, not all as most new games are optimized for DVD-drive and you will most likely not notice a difference, but for older games, the difference will be noticeable.
I do wish MS would do what sony is doing and having some 360 games available through the market place. With the increasing size of the 360 Hard drive, this could be possible and eliminate the need for discs.
Since most games are smaller than 7gb, this should not be a problem.
I wonder if any future game would require you to install the game to the HD like a lot of PS3 game install parts of the game to the HD.
With the limitation of the DVD-DL, I wonder if that would happen.
With allowing you to play a game from the HD without the need for the disc, those games would not be able to be traded to a place like Game Stop since the game code or whatever they use would be linked to someone's gamertag.
They could, theoretically build a unique code into the disc itself and when you go to install the game, you have to log into live and the code would be checked to see if it is locked to someone's gamertag other than yours, and if it is not, allow install.
Then you could ant any time de-authorize the code so someone else could install the game on their console, similar to what Apple does in iTunes.
For people who are not on live or don't want to link the game to their gamertag/console, you would to have the disc in the drive in order to play.
Only time will tell what MS will do.
Does anyone know if Xbox1 games can be installed to the HD?