I'm sorry I dont see where it says this, so if I have the iPad Air 2 not cellular, my return home won't work?!?!
No that's not the case.
Some are making having an Apple product with cellular seem necessary, because of the GPS enhancement of the Apple cellular products. Evidently, there are some features of the app that need the GPS functionality to work. It's sounding as though those enhancements aren't for everyone, and seemingly generally not missed. In my opinion.
I personally don't use the orientation of the remote (eg the animation shown in the video) to judge my position- I use my eyes on the bird. That's just me. I get that some might use it.
Mark.