I think it is really hard to plan on get acquired. Even if it seems logical that Google might want to acquire the company, funding it would be hard. The startup would have little leverage in negotiations, if they were lucky enough to have them. Investors would have a hard time imagining a good return, if there was a successful outcome, i.e. the acquisition.

My example doesn't add much more value than conveniences. That's good, but it probably isn't a sustainable business.

If I were really considering my example as a viable startup idea, my comments about Google (in the post) would push me to dig deeper and look for more value than the just the cross product search feature.