I don't really care about Epic (because they are far from being a dream company you are likely to sympathize today - they hardly care about anybody's rights actually, just about their own revenue) but once I have an iPad/iPhone I want alternative browser engines, terminals, emulators/VMs and being able to write and run an app of my own without having to even inform (let alone pay) Apple about this. I also believe 30% is too much for an app developer to pay the device manufacturer anyway.