It may seem like aeons ago, but it was only last year that Apple launched the original iPad – single-handedly refuelling the tablet PC market. Fast forward to now, and we’re inundated with iPad competitors, with new devices announced on an almost daily basis. But are they any good?

Forget the actual hardware, though; it’s the operating systems that define this tablet generation. The four major platforms for tablet PCs differ wildly, but each one is striving to achieve the pinnacle of touchscreen input usability.

Our question to you is a simple one: which one comes closest to perfection? Click one of the answers below to cast your vote and have your say…