You could carve around stuff well, and I imagine it would open up an entire new door in tricks in skateparks and stuff. I mean, that would look sick(might have problems with the wheels catching on the boards when you cross, but screw it). But it would still be fun to zoom down streets and stuff.
So I spent an hour drawing a prototype(after drawing them, the brakes seem somewhat useless. Or maybe not. I guess if they were powder brakes that were heavy rubber that would be cool):

What do you guys think? Obviously a lot would change from now until final manufacturing time, but if it was good and worked okay, would you buy a pair? Is this even worth pursuing?
Anyway, just an idea I had. The whole point was to remove the y axis from rollerblades, since if you lean forward or backward you're screwed. And I was getting sick of no snow here. Hahaha