Lol, that is highly unrealistic. Where is this magical secure garage going to come from? Underground parking costs $40k per spot to build, above ground is similar. Add in the cost of security and the long term costs of parking are extremely high. The parking minimums in most places force parking to be heavily subsidized, which isn't a sustainable model when it comes to long term matienece of suburban areas, unless we can heavily increase taxes to pay (5x to 6x) for road, water, sewer, and all other maintenance needed.
Self-driving cars will replace buses? And who, pray tell, will pay for expanding our roadways?
http://john-s-allen.com/blog/wp-content/uploads/2010/03/muen...
If the car is electric, it isn't so bad on the environment, and it can park itself in a no humans allowed garage (so little chance for breakins). As for rush hour, I'd hope swarm scheduling lowers congestion substantially (though this and making longer commutes tolerable really just means I'll live further from work).