Not me, atleast not for a long time.
With MV, I really only care about the networking capabilities, the ability to change the grid size, and the higher res out of the box screen, as I would love to make a multiplayer TCG, but I definitely don't see any point to move my current project over.
I also don't feel, even with the jump start with plugins it will have, I'll beable to do anything even remotely close to everything I can do in VX Ace now, in MV at release. There are so many scripts for VX Ace, It's not funny, and while Yanfly working on doing some is a big+ (he converted his message script into a Javascript plugin, which is a must use), unless Hime is converting most of he more useful scripts over, I forsee it being a long, long time before MV can catch up to VX Ace.
Another issue is, I don't know how to do Javascript at all, so It's not likely that I'll even beable to modify existing plugins to fit my needs. Oh speaking of that, I', not too fond of the fact you can't modify the Javascript within the editor either, It's just a hassle/waste of time having to edit them in a outside program, jump back into RPG Maker to test, just to find out you did something incorrectly, and then having to go back to that outside program, to try and fix such.
I'm sure the problem is on the Javascript side initially, because it requires to be in a special format, but seeing how MV is based all around Javacript to beginwith, would it have been so hard to add a Java script editir/reader to the editor.