If you want an Audi interior, buy an Audi!
I have my 2010 Camaro already, so I don't care so much about future MY's, but I guarantee the overall cost would be alot more if you replace the interior with Audi materials.
Did GM miss the fact that their 2010 Camaro just won a crazy amount of awards? Of those were.... Best Design, and Best Road Trip vehicle.
If it ain't broke, don't fix it!
(Let the few cry babies whine about their interior, that's never been what drew the masses to the Chevy Camaro!)