Ultra Ever Dry (http://dry.technology/index.html) has been around for a while now. It is pretty remarkable.
The only downside is that it needs to be reapplied (and it cannot be used on windows). It wears off at a rate depending on how much abuse it takes - anything rubbing on it will hasten its decline.
EDIT: To dvcc's point below, this sounds very negative.
It is actually positive - earned media, essentially for free. Amazing job by Nissan marketers.
Reapply ever 5000 miles when you rotate the tires, and use RainX on the windows.
I guess in such a case the whole brand would benefit. Every single car would be like an advertisement with all the spotlights on them.
I get a free car wash with each service of my car. That takes long enough.
Regardless, my point was mostly acknowledging that even in mature industry's there seems to be room to innovate.
First, what a great marketing angle, a self-cleaning car, how cool is that! I imagine 6 o'clock news stations across the country showing clips from this video tonight.
Second, what a great up-sell opportunity. Now every oil change service done by Nissan can include a new $50 charge (or whatever the market will bear) for re-applying the self-cleaning paint.
Third, could they even push an environmental angle? Ie. litres/gallons of water saved by not going through a car wash?
So, with one new feature Nissan has gained free marketing, and an incremental revenue source for their dealers. Not bad for a mature market.