iOS 5 Will Apple Ever Start Charging?

Well with the up and coming release of iOS 5, you have to wonder if Apple will ever decide to charge for major releases of their OS’s like they do for their Mac software. The upgrade from leopard to lion costs money, where as the minor updates are free, so really one does have to wonder if this we will see this across all apple OS’s.
iOS 5 introduces over 200 updates and is set to revolutionise the smart device market.