As someone who has (far too much) experience in going back and forth between these devices, I'll say this.
If you're someone who is used to using an iPad for the "consumption" type tasks, you are going to have some mental hurdles to get over in respect to the fact that a Surface Pro just isn't, and probably never will be as convenient to use for those things as an iPad. It WORKS, yes. But those things are basically what an iPad is made for. So it's an adjustment that you need to accept if you're going to use a SP for those things.
There is also the whole battery life thing too. What might bring you down to like 90% battery life on an iPad is probably going to bring you into the 70's, maybe 60%'s on a SP.
I get the conflict though...I experience it often lol. You KNOW the SP can do so, so much more and they aren't even that different in price (depending on SP specs of course,) but the iPad does what it does very, very well. I guess as far as problems go, there could be a lot worse.