I may be more of a Nintendo gamer than I am a PlayStation or Xbox gamer, and arguably a bigger PC gamer than any of the consoles, but even I know that blocking used games is going to be a console killer. We already know the Wii U doesn't do such things. I can attest to this because I own a used copy of New Super Mario Bros. U. Sure, maybe it only saved me $5, but that's still $5 I was able to put towards a pre-order for Pikmin 3. The fact remains that if this does happen, or if they attempt to do an "ultimate pass" for $100 which allows gamers to "unlock" unlimited used games, I tend to agree that the Wii U will reap the benefits of higher game sales since they will have the used game market all to themselves.
To be honest, I don't want any of the console makers to fail, so I just hope all these rumors (some dating a year old) just tend to be complete crap.