You don't need lossless audio in a car; there's no way you can actually hear the difference, because the listening environment in a car (any car) is lousy: even parked in your garage the interior is too complex. On the road, road noise (even in a high-end luxury car) will overwhelm any tiny difference you might be able to hear. And I seriously doubt you can actually tell the difference between lossless and a high bitrate Ogg in a blind test.
As for real handbrakes, my new Mazda3 has one. Of course, it's a sport compact, not a luxury car, so it aims at a different market. But it manages to have loads of tech features while still having a real handbrake.