What gives me some confidence that things might happen sooner is that, GM, for example, despite claiming for years it wasn't going to invest in a "pointless" hybrid programme realised only very recently that they were in danger of missing the boat and how dangerous the lead of Toyota and Honda in the new field had become.
So, from no (real passenger car) hybrid plans at all last year to the unveiling of the
Astra diesel-electric hybrid this year seems to me like seriously quick progress. I suspect they are absorbing a lot of information from the Daimler-Benz European connection. Nevertheless, a car capable of 0-60 in less than 8 seconds, yet also capable of 60 mpg (US) is quite an achievement. Sadly, as a result of your low pump prices, this car is only going into production for the European market.
Come to think of it, another interesting car you're missing is the Astra ECO4. It's diesel, low emissions, and managed
75mpg (US) on a cross country run recently. It only costs the same as the base car.