I don't know. Remember when they pushed an update on the ps3 that wiped out legally using linux. You could boot the ps3 to the console side, or boot it to the OS. I loved playing with linux on the ps3 and still use it to game.
Then because someone hacked the ps3 through the linux boot (I believe), the next update gave you no choice, effectively bricking the ps3 if you wanted to continue using linux. I put off the update for months, but eventually gave in to keep playing my games.
I think Sony argues they own and rent you the unit, so if they decide to make it a paperweight because the next gen has come out, they can do it with an update.
And I believe there are a few lawsuits right now vs Sony...
I guess we'll see how far they will push it.