More quickly than seemed possible a few months ago, sticker prices for electric vehicles are falling closer to the point where they could soon be on a par with gasoline cars. The tipping point when electric vehicles become as cheap as or cheaper than cars with internal combustion engines could arrive this year for some mass market models and is already the case for some luxury vehicles. That break and the tax credits for buyers of electric cars could allow battery-powered vehicles to achieve price parity with gasoline cars as soon as this year