We could have the first Mining Dapps for phones, from the bloke that owns the company that has lead the field of research in this area. Think of the take-up in the underdeveloped world. Its a good job Charles comes for free, we could never afford this development milestone otherwise. He gets to test his Theories with a live network.
Think of the demand for 64GB and 128GB phone memory cards!
For phone? I think it is not good for the phone, because it will be very hot, lol, like PC. And power of battery is much lower than PC, have to keep charging.