Bugger you took the words out of my mouth! Yeah, these petty diversional tactices are merely temporary. Any attempts to maintain this type of diversion will in the long run casue them to fall behind and lose market share. (Really this is already happening, what with GM, Ford and Chrysler going bellyup in variying degrees)
In support of that:
Economics is really the only driver of corporational change. Corporations only change when things become uneconomical or unviable.
So when better performing technologies come out like the Lexus GS450h and are brought to market (this car is actually faster AND cheaper than the traditional gasoline offering) other manufactures will have to adapt and compete or die.
As for the Tesla, lots of promise in that. Its rumoured that the intial tests are showing that it's faster and cheaper than Porsche Boxer S that its considers direct competition. Can't wait to see if these claims are true. If it is then again: the competition will either die or step up.