not possible on ipad, but i did see it work on (android)tablets but you'd need a super powerful tablet.
and yes its playable very good actually but playing with a stylus ain't my thing.
i've tried it, it works here is some proof, but honestly it breaks the fun and its hard to play while on the go.
Pls rename the title of your topic, it is highly misleading. At least put a "?" at the end of the title or just rephrase it completely.
I tried D3 on my Surface Pro 3 and it wasn't very much fun to play. The performance of mobile devices like a tablet or netbooks is way too low for a game like d3 to work. Apart from the performance issues, i would not know how much time it would cost to compilate a 20-30gb x86-application down to a level where arm-architecture would work.
Of course you can (Video) just make sure your pc is on and someone is there to manage it when you need it. A good internet connection is also required.
Alternatively you could dig for a cloud gaming platform that has Diablo III (though some let you install games on their servers via services like battle.net and steam), but that may be a hassle since most of them were either bought by big players for their consoles (sony, steam) or lots of things required by these platforms to operate were licensed by the same corporations therefore they were forced to either die out or start from scratch.