[huggah]

Besides the legal and regulatory hurdles Google would have to overcome to make this work, I don't think Google wants to be in the business of making an industry more efficient when that industry doesn't need to exist in the future at all. That is to say, why scan mail when you can just convince people to use email?

Packages, on the other hand, will still need to be delivered for the foreseeable future.

[uptown]

Mail will certainly decrease, but I don't think its ever going away. And there's already companies that provide a similar service. Anyway, maybe I'm wrong - but it'll be interesting to see what they do with their acquisition.