I don't plan to yet but I do admire it.
I have to fly to some gigs next year and I've always been hesitant to fly with a keyboard... a MidJay in my carry-on would make renting a piano at the site more feasable. I'm going to hold out a bit longer and see if my laptop can cover the same territory, but I'm not adverse to buying a MidJay someday.

It would be cool to see a keyboard version of the MidJay come out. Add a great piano soundset and a 76 or 88 note graded-hammer action keyboard, beef up the polyphony and keep the size & weight to a minimum... I'd buy two.