My brother has a Chevy Volt and it runs fine on electricity for relatively short distances (commuter range). It needs to be recharged, and if electricity is out at your house you're up the creek - without a generator. In comparison the hybrid (gas-electric) has some definite advantages.
I don't have any experience with the Volt but it should be able to charge it's battery and run the wheel motors off the gas engine. Quoted range is 380 miles. It's supposed to be cheaper/greener to charge it off mains power.
Volt power page