Tablets are lightyears behind consoles.

[Arkaign]

Even if the tablets get substantially more powerful (they will), the control interface and game quality standards will still be abysmal.

It's why Japan, the most mobile-centric market on earth, still sells a metric crapton of 3DS and even Vita units.

No dev really wants to spend the money making a truly amazing title on a phone/tablet, because they don't feel they can get $40-$60 for it. Phone/Tablet casuals want free games, .99 cent games, and maaaaaybe a handful of $4.99 games. But $40+? Forget it.

Tech is a moving target anyway, but everything is slowing down thanks to new nodes being more and more difficult. By the time 10nm is here (roughly what would be necessary for an iPad to fully match PS360 horsepower in a sub 5-watt envelope), we'll be looking at 9th gen consoles and a new gen of handhelds, and that will move the target that much further down the line.

It's not a fair comparison anyway, as a console can easily use 50-150 or even more watts, whereas tablets and especially phones are limited to a tiny fraction of that, meaning they have to cut massively down on CPU/GPU. That's not even touching (lol) the storage and memory limitations that also come. Fast memory and especially GDDR5 and beyond make some decent heat.