I don't think anyone expects Petr Cech to remain at Chelsea now that Thibaut Courtois has taken over as number one goalkeeper, and while it's pretty clear that he'll be remaining at Stamford Bridge for the remainder of the 2014/15 season, he'll almost certainly be moving on this summer. On that front, The Telegraph is now reporting that Chelsea won't attempt to block a move to a rival, should that be the move Cech wants to make:
It has been widely anticipated that Mourinho and Chelsea would try to block Cech from joining Arsenal or another serious rival in the Premier League or Champions League, but that would not be the case if he asked to leave. Cech has given Chelsea almost 15 years of superb service, winning the Premier League, Champions League, FA Cup, League Cup and Europa League with the club, and will be guaranteed a respectful exit if and when the time comes.
The fact Cech has taken his demotion to be deputy to Courtois so professionally only underlines Chelsea’s commitment to act passionately towards the player.
While I don't ever want to see Cech wearing an Arsenal or Liverpool kit, I do like the fact that the club won't interfere with the move if that's what the player decides. Without a doubt, he's earned the right to move wherever he wants now that Chelsea have decided to move in a different direction.
That said, please don't go to Arsenal, Petr. Watching the Gunners throw away leads in the most entertaining possible manner is just far too much fun, and that would almost certainly happen less frequently should The Emirates be your landing spot.