Haven't tried the kite, but I have plenty of hours on a wakeboard. Reading your question I realised that most of the time when people ask me about how riding the OW feels like I refer to snowboarding or wakeboarding on a glassy lake, you know, when you just hear the "sssssss" sound as you go. That's the feeling I get from doing large turns in highspeed with OW.
btw. I'm also waiting for my board, put in the order yesterday, so with that 8 week backlog they have, it's going to be a looooong couple of months.. fortunately a friend got his board a month back so whenever we hang out I can feed my addiction with a full battery of riding.
I just wanna say I think the onewheel is a classic!
Oh yea.. we're in Helsinki Finland so anyone else up in here with a board, it'd be cool to share some spots and practice some tricks together.