This doesn't stop with handheld computers. If Google will be able to get away with it on phones (which is FAR from guaranteed atm), they will do it on Chromebooks. Microsoft will do it on Windows. Apple will do it on Macs. Then the hardware manufacturers will only allow "trusted" developers via TPM.

Full ownership of all our computers must be norm again. It's fine if tech companies want to charge extra to sell walled gardens and market it as extra security. But they must sell computers and software that the buyer actually owns.