It looks like Apple will be taking the same steps in iOS 5 as well. But some things need to be changed first – at the moment, iOS updates are over 600MB. Carriers have been getting rid of unlimited data plans which make upgrading a device over 3G or 4G a pretty expensive affair. Normally a file that large would be downloaded through WiFi, but not everybody has access to WiFi at all times. Either Apple will work out a deal with carriers to make the update downloadable for free, or Apple has to reduce the size of their updates.
A new backup system should also be in place – since users won’t be using their computers to update their devices anymore, a cloud-based backup system sounds like the right idea to make OTA updates viable. OTA updates would make the update process a lot more convenient for consumers and sounds like a step in the same direction that most companies are taking right now – towards a computer-free world.