People want to know where they are going. Very few, if any, people would be happy looking at where they've been. The dash is most likely two-fold: they have to cover up what's behind the dash and they need a place to put things like air bags. Finally, if I was designing this, I'd want it to feel enough like a car that people fully recognize all the ways it's not a normal car to increase their excitement about it. Just like they put a cartoon face on the front, complete with a nose: make people feel good about it.