I really hope Audi won't put A5 fascia (headlights & air intakes) & rearlights all over the model line.
I really do. But based on Huck's latest impressions of future Audi models A5-ization of Audi model line is unevitable.
It's really cool to see some difference between Audi core models (not incl. TT & R8). But as I said many times - when Audi find some distinctive design elements they spread them all over the model portfolio immediately, and make them common (eg. single frame grille, rearlights A3 SB, A4, A6 Avant etc, air intakes, etc).
Family resemblance - yes, cloning - no!
I'm quite irritated when I recall how BMW were criticized (in automotive press) because of "same sausage, different lengths" designs in the past, but now when Audi & some other car makers are doing the same everything is OK.

Funny.