On the other side of the coin, I have an original Surface Pro from launch day that works flawlessly as my laptop replacement. I got the USB GPS for it but up until now no one made aviation software for it. Since I have a Garmin 900X going in my RV-10, I queried Garmin and was told they have no plans for a Windows version of their software. Ditto Foreflight. I have no use for an iPad, not because it's a bad device but I need something multi-role for teaching Computer Science, so I was kind of resigned to not having an EFB even after the Surface came out. This gives me new hope; Jepp is not my first choice but maybe Garmin will come around now.
Edit: by the way, comparing the iPad and a Surface is comparing apples (sorry, pun not intended) and oranges. The iPad has a limited OS, which DOES make it more stable than a laptop with an open OS like OSX or Windows. The point of the Surface Pro is to fill the niche between tablet and laptop; as such it is prone to many of the same troubles that laptops fall to, though my particular machine has escaped those dramas partly because I have experience in dealing with software compatibility issues. For me, it's a perfect laptop replacement but if a tablet is what you want, I'll be the first to advise you that it's too much/too expensive for you.