I have an iPad3 (along with a rMBP and iPhone6+). The iPad is slow and underpowered, and Safari is constantly blowing pages up and having to reboot them. It's gotten to the point where it's getting real close to being useless. A year ago, I had had enough, and I wasn't happy with Apple for not offering a 2-1 system. So, I got a Lenovo Yoga running Win10.
I've been very happy with the Yoga's hardware. The screen is spectacular, the Sky Lake processor and 8GB RAM have lots of get up and go, and so on. The touch screen mode is really good. But Win10 in general absolutely sucks. I've used DOS/Windows systems from day 1, and Win10 is just one more turn of the crap crank from MS. OSX is worlds better, IMO. I'd agree that a more robust touch version of IOS is needed, certainly one that lets your manage system resources like OSX does, and doesn't handicap access to them like IOS does. I don't know, I may end up craiglisting my Yoga because of Win10.
I still use my iPad3, but I am VERY interested in the rumored 10.5 inch in a 9.7 inch form factor iPad. Getting 802.11ac will be a real help in performance, and the upgraded processor will be terrific. The March announcement will be interesting.