The Good
Looks like good news for those that care about GUI using HDMI & more zones.
USB DAC
8 HDMI ins, 3 HDMI outs
The Bad
Looks like even fewer analog I/O for legacy devices (2 analog in but zero out

)
Yet to be confirmed whether MCACC/DSP can be applied to MC analog in's. If not, then it's a negative-o.
The Ugly
The same old 9 band MCACC with single crossover

The Ho-Hum
4K pass-thru (no scaling even though technically the Qdeo supports it)
I guess the SC-57 is really obsolete now

I guess I've been made too cynical about this company

Open that checkbook and time to upgrade, everyone!
Those 55's & 57's are really behind the tech curve at least how Pioneer looks at it

If I were a current 55/57 owner, I'd also consider the Audyssey options before plunking down the credit card to swap to a 68.
Pioneer still isn't listening to what enthusiasts are saying about MCACC's limitations (sigh)