The problem is safety measures never go away. No legislator wants to be the one who "got Jonny killed" when the inevitable freak accident occurs. TSA anyone?
That says to me we will provably see the (shudder) hybrid model first (like the Chinese van I saw) that has both the rear view mirror and a small camera looking back. Only after years of both would the mirror get smaller an smaller and eventually be OK'd to eliminate. If it happen at all.