If he plays for another 7 or 8 years (Which is highly unlikely) as England and Australian Boards send their players home early even before they reach their peak at 38 or 40.
In the recent past I have not seen too many Foreign players like Jacques Kallis, Graeme Smith and Ricky Ponting who could have easily prolonged their retirements and broken Sachin's records on the way.
Will be Surprised if Alastair Cook is still around for another 5 years from now. Ian Bell has also been dropped despite having a very good Test record.