And? Some people will take advantage of it, most won't because it's too much of a hassle.
Look at netflix back when it was just a disc-based service. Just get as many DVDs delivered as possible, rip them to your HD and then pop them back in the mail. Some people did that.
Most didn't.
Also, the Xbox One HD is only 500 GB, you can't install quite so many games (delivered on blu-ray) before it gets full.
The difference is that ripping a DVD continues to be a pain in the ass for most people, while "ripping" the game disk will presumably be something the XBox makes seamless.
Now I get to buy and play Halo5 and then give the disc to my brother.