Having owned or co-owned Supras of all four generations, I'm happy at a first impression. I see a lot of 2000GT in the design, a bit of third gen Viper in the line that runs from above the rear wheel to the bottom of the front wheel, and some Porsche Cayman in the hatch glass / rear fender line from a side profile. All in all, the style isn't bad as far as modern cars go.
I'm in my mid thirties, a DINK (double income, no kids) thanks to an awesome wife, and a lover of all the fun cars Toyota made. All in all... I'm probably the demographic Toyota is hoping for here. However, the lack of a manual is a non starter for me. In 18 years of driving, I've owned four cars with automatics, two of which were sedans, two of which were super clean old Toyotas. So, about one in four, I'd guess, were automatics, and never by strict choice. The other problem, for me, at least, is the 800 lb gorilla in the room: BMW reliability.
Allow me to expand on that thought. I have a 1987 Supra powered by a 1jz that I swapped in back in 2009. That engine had something like 60k to 70k miles on it when I bought it, supposedly. You know how JDM engine sellers used to be, everything had 60k on it, but JHot had a stellar ebay feedback rating. Anyway... I put another 25-30k on the engine, a lot of hard, hard miles, driven in every kind of weather imaginable. I had fun with it, every time I drove it. in five years of daily driving, I only needed to add a manual fan switch because the thermo switch didn't kick the fans on soon enough to keep things reasonably cool, and my fans sucked at the time... and I had to replace a coolant hose on the front turbo that I should have replaced when the engine was out before going in the car.
That's it. Five years of daily driving and two minor inconveniences. Took the engine apart to build it into the thing it is today, and the bearings, they literally looked brand new. The machinist that did the machine work was rather impressed at the durability of the internals. I have a feeling that very few, if any, performance BMW engines, can attest to this level of durability and longevity. It's a shame, really, I've seen monster power come out of the old S50/52/54 engines when turbocharged, but for how long, I never really heard any good stories.
As far as the performance of the Mk5 Supra goes, I suspect it will be a 12 second car right off the boat, and that people will shortly find a way to get rid of the gas particulate filter, just like they often do with the dpf on trucks. I see a good future ahead of the car, it's just gonna take some getting used to for most of us. =)