I will more then likely not buy one. It seems redundant; not quite a full laptop but more cumbersome then the iPad Air. I love my Air 2, and even though I have a 6 Plus I use it every day. These hybrids don't even make that good of a laptop because it's hard to rest them on your lap since they are top-heavy.
I know someone IRL who has jonesing for a bigger iPad running some hybrid of OS X and iOS. That's it, one person. And IRL at coffee shops I rarely see people on a Surface or other Windows hybrid/two-in-one. They are either on their tablet, notebook or phone. I have a feeling the hybrid market, and tablet market for that matter, may go the way of the netbook. I hate to admit this as I love my Air 2, but that's what it looks like.
I agree though, something needs to be done to revive the iPad line. If this 'hybrid' saves it so be it. I'll probably stick to the Air line.