I have to disagree, I can't see a console being made harder to use. For example, my wife is not going to mess around with passes (unless you hold it up to the Kinect to scan in).
I could see something like a timed verify working though, the game will work in offline mode for 15-days without needing to see the disc in the console. After this period you are notified (like Zune Music) to either go online to sync your license or insert the disc. Sure this has some problems, in those 15-days you could return the game to the store.
Anyway, I think that overall you have to keep the ease of use the same or even better than the current gen. Making it less accessible to the masses is a bad idea, IMO.
-- On the Kinect to scan idea, we have seen them try this before (even with the webcam deal). But now the tech will be ready to work correctly. Kinect is required (so we think), so if you want an easy to use solution to pass codes this could be one.
Best solution - don't use passes, don't use DRM, just keep it the same as it is with this gen. Embrace digital download as it makes the whole resale process harder, although I fancy the idea of an online AH for used DD games. Keep physical disc sales the same as this generation though, and move towards DD and maybe even releasing DD ahead of retail in the near future. If you can make DD more attractive than retail, I think from a business standpoint it solves lots of problems.
I do have a problem with DD, as I have four consoles and I will move around the house during the week wanting to play. So currently with a disc and cloud saves it is really easy, but for my XBLA games not so much. Each console has its own user account (my wife, my son, my dev unit, my main unit), so I wish for a more friendly way of getting games across the house in that case. Tie it all to the mac of my router maybe? Heck would love to see the ability to play a game over local multi-player without needing to own two copies or more.