Re: Looks neat - Gibby Content from me for once!
This is obviously way more useful for swapping between tunings than it is for just making sure you're still in tune between songs. And this may be controversial, but I think that for that purpose, it's a little simpler and more convenient than having a guitar for each tuning.
I play in standard tuning 99.9% of the time, so it's completely useless to me. I think a lot of new tech stuff that gets put on guitars now is only really useful if for some reason (space, money) you are limited to one guitar.