And if places that are Not-Norway had such incentives, it might be an enticing proposition. However, here in exurban Chicago, I still have to pay sales tax, delivery, etc., I don't get free parking in downtown Chicago if I was insane enough to drive there, I don't get to drive in the bus lane, and I still have to get soaked for tolls when I get on I-90 to get into town. Plus, if I did drive a Model S into Chicago, I'd have to find a charge point, because I'd never make it back if I didn't. And, given normal variance of electric charge, it'd be a 50-50 proposition that I'd make it there in the first place.
In other words, great for you, great for your brother, glad he's getting one, etc., but not great for me. I'd jump on an HCEV if everything was in place, I'd consider a range-extender if a car company that I'd like buying from put out one (and if there was a diesel-electric option), but not a BEV.