Apple are playing a dangerous game
Its probably impossible to make a phone (or a pad, which is basically a big phone) without infrongng on someones patent.. that is well understood, and so they al either cross license or turn a blind eye to it.
Then comes upstart apple, who seek to use the patent system to destroy any and all competition. This has two potential results. 1. They lose a signifacant number of patent claims, weakening their position (this has already started to happen - to get a temporary ban on the galaxy s they lost several patent claims in the process, including look and feel ones) 2. The other companies go nuclear on their ass, making it impossible for them to produce iPhones or ipads.
This is going to get a lot uglier than it is now.