It's not just about a wider middle seat, though: the new configuration's also designed to make boarding the plane easier as well -- by actually widening the aisle itself, from 19" to 41". Molon Labe Designs predicts a 28% increase in boarding efficiency thanks to this Transformers-esque innovation, and we're all for it.
Granted, the Side Slip Seats don't look insanely comfortable, and there's only so much padding you can include when you're stacking airplane seats like plastic chairs at a backyard barbecue, but personal space and boarding speed are huge sticking points for air travelers. Who isn't willing to sacrifice bounciness for a faster takeoff and some added rump room?
Given what we know about airlines, though, they'll probably implement this for exactly the wrong reason: as a way to cram even more of us onto the flight.