AAPL's horse can do several tricks but doesn't have much stamina. They have to redo their product every 18 month's or lose massive margins. How many versions before the smart phone is perfected? Google on the other hand with 70% of the world search market is a monopoly and their second trick pony (Android) works in tandem very well with search not to mention their 3rd trick pony (YouTube). YouTube is killing it too.