As far as I know, they aren't making screens, batteries, memory, and lots of other components, so they are yet to fully control the supply chain, but they are one step closer.<p>However, I wonder how the business scale of building their own processors is going to work for the. 
Will the A4 move into the iPhone products? 
If the iPad isn't a huge success, that processor is going to cost them more than having bought from a chip supplier.<p>What tech does the new processor really bring?