I noticed the announcement carefully avoided the "sedan" word; it's a "sports coupe". If Porsche goes thru with it, it should be a good car.
Wasn't the 4 door sports coupe seen first in the RX-8? I test drove an RX-8, chose a used Box. Having said that, the 4 door concept with a usable rear seats is not a bad idea - 2 seaters undoubtedly lose a lot of other buyers.
And, 2009 is a long ways off, will be curious to see what they do with it.
As for me, I'll stick with 2 seats, open air