EPA Waiver Economic Impact

Will the EPA waiver for California have a negative economic impact? Some people think so and my thoughts are BS.

Why? Take SUV's for example. Hyrid SUV's already exist and don't cost that much more than a regular one, but with cheap gas why would anyone want to buy one? Hmm...

And I thought Detroit was already working on lots of hybrids and electric cars already?

References:
Obama directs EPA to reconsider Bush-era auto emission policy Los Angeles Times