I came very close to replacing my Mac Air with a Surface Pro 4 this past year, mostly didn't because of compatibility issues with Adobe Illustrator, my favorite

I came very close to replacing my Mac Air with a Surface Pro 4 this past year, mostly didn't because of compatibility issues with Adobe Illustrator, my favorite drawing app. MS claims 4h battery life at best, which I did find was true... after you dig deep into legacy control panels that look like it's still 1995. Out of the box the Pro 4 loves to wake up in your bag, look for wifi, then stay awake for a while doing absolutely nothing but burning through power, and you maybe get like 1h of actual use when you get to wherever you were going. I'm currently using a Wacom Mobile Studio^1, which also gets 4h. I'm constantly AWARE of and WORRIED ABOUT the thing's power levels in a way I'm not on the iPads. (Or the Mac Air for that matter.) Apple lists like 9-10h for all current iPad models. I may have my experience colored by mostly running a couple of desktop apps on my Win10 tablets, but I really find that Windows is not a very good tablet OS. Even in "tablet mode", which I keep it in pretty much all the time. It's just clunky and weird and maybe some of that's because this is the first Windows machine I've ever owned in my life, I dunno. In general I don't think I'd recommend getting a Win10 tablet to replace an iPad. Get one if you have a Windows app you want to run, if you just wanna read stuff then buy a new iPad and don't worry about finding new apps to do the same stuff. 1: heavy, expensive, no kickstand, doesn't fit in most 13" bags. But it's stylus talks to Adobe Illustrator and that's my medium of choice.