the 4th gens were available with leather seats but they were not heated... the TA seats were "upgrade" seats compared with the SS and Z28 seats... the TA seats has air adjustable side bolsters and lumbar... the Camaros got six way adjustable seats but didn't get the air adjustments.
its a pretty sure bet that the 5th gen will get heated seats for driver and front passenger... the new Tahoes have heated front and second row seats, so I can't imagine them putting anything less than two heated seats in the "upgrade" leather seats category
what would REALLY be nice is if they were to offer heated and cooled seats... now that would be PIMP! I'd pay an extra $200 for that option