Shit, hope not.
I also didn't know the mustang platform was supposed to be much much lighter and be shared with RWD Lincolns, but was also cancelled. Imagine if they went forward with that. Mustang would be even more amazing and Lincoln would be competitive/ a real leader now.
Holy smokes some of those drawings/mock ups are amazing! S650 should be great. I hope they keep those massive rear fenders.
The phone case key is an interesting concept, and might be nice in addition to the regular set of keys, but overall adoption would probably be a low %.
If the BMW M4 can be 3 inches shorter in length, have more interior space (especially in the back), be lighter overall, and only lose .4ft³ in trunk space; I'm sure Ford can trim here and there on the s650 without sacrificing too much.