It's like a console, not a computer. The software is matched to the hardware, you don't need to worry about it. The Air 2 has 2GB of RAM and it plays X-Com smoother than my PS4 lol. So honestly, no need to worry about the specs.
I've found the iPad line to be extremely long-lasting as well.
I know that the HN crowd likes to complain it's not a "real computer," and I agree it's not the same thing, but it IS a pretty awesome portable computer-like console :)