I'm not sure how you can say Street View is "one of the less useful products to come out of Google". I use it all the time to familiarize myself with places I go in Chicago that I've never been to before. I would imagine realtors find it invaluable.
I agree; Street View is one of Google's best services.
I rate it right up there with their mapping services in general and Google Books.
Just because something has minimal commercial value does not mean it is useless.
If you object to it being called "one of the less useful products to come out of Google," how about one of the most annoying, the most intrusive and grabby to make more money, and pretty close to the most obnoxious.