I have always use my iPads from the ipad 2, 3 and 4 with Remote Desktop (jump app) and they always have a lot of lag. With the iPad air I notice that windows 8.1 works flawless on it. I can even edit video from my iPad. Obviously this wouldn't replace a windows tablet and only works great on your home network but it's a nice feature. I haven't tried Microsoft new remote app but I'm sure it works just as well.