> Search "headphones" on Google and you'll see the massive ad spot taken up by Google Shopping
What's wrong with that? If I'm searching for headphones, why would I want to be taken to another search engine that indexes headphones? I want to be see the best prices and be taken directly to the websites that actually sell headphones.
There's nothing inherently wrong with a monopoly. If you think Google is a monopoly, it's only because they provide the best results. Switching to a different search engine is so unbelievably easy, I don't see how you could ever claim Google's monopoly is harmful to consumers.
There's nothing wrong with it, other than that fact that you have no choice in that case but to take Google's word for it on the lowest price. Maybe there are other sites out there that do a better job finding low price headphones but you'll never see them in the search because Google prefers its own sub-standard offering instead.
There aren't. I reckon that's probably why Google offered Google Shopping in the first place - all the other price comparison sites I've tried sucked, and it's hard to come up with a suitable incentive not to suck given the SEO techniques they use.