He said more than just that. He said 4X his own company's stock went down 50%, and when that happens if you have cash, its time to buy your own shares back at a discount. He didn't say how high he thought Apple stock could go from here, but he was being asked about Apple by the interviewer. He said "buying $1 worth of shares with $0.80 is a good thing".
That's a 25% gain. That's what I want too: I want Apple (the company) to buy AAPL (the shares).
I like and respect Warren Buffett, but I don't think it's that he's so smart, it's that everyone else is so stupid :(