I just test drove an Emira today in Wilmington, NC and I'll write my full review in the test drives thread. However, one thing I checked since I had read this thread were the condition of the red leather seats. This car had 4K miles on it and has been driven by probably hundreds of people over the past year given that it's a demo. It had red leather seats and they looked like new with no bagginess at all. Unfortunately, I forgot to take a photo of the seats but it was encouraging to see such a heavily used car (albeit still relatively new age-wise) handling it just fine. I would have to wager a year of being a demo car (people getting in and out at least a dozen times a day in both seats) is probably similar to at least several years of even a daily driven one by a single person.
I hope that helps alleviate some fears of the leather seats. It was a non-issue on the one I saw today.