Intel didn't start releasing fanless processors until 12nm. Apple is currently at 16nm with the iPad Pro. Obviously Apple has been able to make All iPads fanless, but when the die shrinks start getting down to 12nm and 8nm, we'll be able to see some huge performance gains and innovations in design. We've already seen the change from the triple core a8x running lower clock speed to the a9x double core high clock speed. This is just coming from 20nm to 16nm. That's a 20% shrink. From 16nm to 12nm is another 25%! We should continue to see huge performance increases in coming releases. The biggest hold back at this point is the screen. If Apple discovers a way to save power on screen lighting, then the iPad could either turn into a 20 hour device or get even thinner!