My opinion is that the large truck market is the only place the shrinking 3 have maintained their market share. Toyota is making in roads with the new Tundra platform, but it will be a while before they start to really take over any market share, especially with them not offering a diesel option(which blows my mind considering they are a leader in diesel engines worldwide).
Honda is and will always be a car company IMO. Just look at the ridgeline, unibody, awd, no low-range. It's a hacked up station wagon on 'roids
I think GM is making progress, the Corvette, new Camaro, Sky, and Solstice are all good cars from what I can gather, and they have the image to go with it.
The next 10 years will be interesting to say the least. I can only pray that some semblence of free enterprise is maintained in the saving of the shrinking 3......but I'm not holding my breath