I think steve can and will break the record for 34 centuries of legendary sunil gavaskar and also will be the first test captain to win 50 test matches and will remain the only captain whose winning ratio is as high as it is now.
If Steve Waugh thinks he can keep going for 15 more years, i am sure he will be able to do it. He has the will power to overcome all the odds. As a great fan of Steve Waugh, I'd be really happy if could go on for another 15 years. I love to watch him play.