Google, Content Farms & Why This May Be Blekko’s Moment

So the only thing that differentiates this from Google is the ability to save some preset search booleans?

What happens once Google adds that functionality? It already has the same types of options (inurl:, +/-, etc.), adding the ability to save them is a trivial addition.

Plus, with all the search engine privacy hoopla in the last few years, wouldn't people be concerned about having to be logged in while you search?