I take this with a pinch of salt (same with the Sony one mentioned before) but
If this was true and if the PS4 preventing used games is true then it would spell the end for Non-nintendo consoles. There would be a huge backlash from consumers (obvious reason), Gamestop, GAME, etc since they wouldn't be able to stock used games anymore. While the former means lower than expected sales (since people who don't care will still buy the consoles), the latter could easily make GS, GAME, etc refuse to stock the consoles (and games for the consoles) entirely.
Now that would really help end both Sony and MS' console career.
Still, I'm hoping neither of the rumours like this are true.