If they can make them as cheap as silicon then obviously people will buy them instead, but it's not clear to me that panel efficiency is a relevant factor in the economics of commercial solar power.
Does the math check out? You would need about 10kW-h to get the claimed distance, times three for the efficiency (by the way, there are NO mass-produced cells with 34% efficiency; they must be using GaAs or multijunction cells to achieve 34%) means solar input of 30kW-h per day. The projected horizontal area of a Prius is 8m^2 (including the windows) so we need about 4 hours of 1000W/m^2 insolation. Which I guess isn't totally impossible. Typical average insolation at populous latitudes is around 200W/m^2.
California requires solar power on every new house. It's a huge cost. Most local governments also require off-street parking, which is a huge cost. The regulatory burden isn't just in planning and permitting.
The number of housing starts in Los Angeles right now is basically zero[1]. 30 years ago the pace of home building in LA was three times higher with a population 20% smaller.