Agreed. I also don't see them having much incentive to do this. It's pretty hard to get right, so unless they truly believe they can offer a superior alternati

Agreed. I also don't see them having much incentive to do this. It's pretty hard to get right, so unless they truly believe they can offer a superior alternative to Google (or any other search engine), they're unlikely to pursue it. Plus, most users are likely not enough of a power user to truly benefit from something as rich/complex as this, hence the reward for the behemoth to pursue this likely won't be worth the complexity and effort.