We all know the S650 is basically a refresh of the S550.
The dash of the S550 definitely looks dated, but still a cool look.
Sync3 is also quite dated although functional at least.
S650 brings a new electrical architecture that is much faster and more capable including over the air updates...
I'm still trying to figure out what I think of the new look, but I can at least say that they are doing a better job than BMW of moving their look into the future.