"self-driving car" and "car capable driving itself on highway under optimal conditions" are 2 totally different things. The real excitement comes when I can tell my car to go pick up the kids from school or drop me off at the airport and then drive itself back home. Anyways this is a great step in the right direction but its not the game changing tech we're all waiting for.
Judging by the article, "under optimal conditions" is an exaggeration. There was no citation of problems during traffic conditions. My father sits through 2-4 hours of Los Angeles rush hour each day, and this is absolutely a game changer for someone like him. This is stellar.
It's incredible how less mentally wore down I feel after a long commute when using TACC. Still paying attention but at lot less effort required.