lol ... every new phone seems to be a "game changer".
I thought I'd like a bigger device too. But the DX is always getting stuck sideways in my pocket, plus it is hard to use one handed because you can't reach the whole screen. Tons of people will love the 4.3" display, of course.
That being said, I'd think the Inc HD will be a fantastic device ... it will fit in nicely with all the other fantastic devices we have available to us.
Android may be a game changer, and the Droid and N1 played a big part. But now all devices have a 3-6 month lifespan. So there really ain't much time to be a game changer anymore - just the hot device of the month/quarter?