Just like number portability, right? I see this working just like Open Auth. You are on site X. You tell them you want to import your data from site Y. You aut

Just like number portability, right? I see this working just like Open Auth. You are on site X. You tell them you want to import your data from site Y. You authenticate yourself, and (insert a waiting period here if you like) then site X pulls your data from site Y in some conveniently packaged format, which is irrelevant to you, the user. Currently do you care how G+, FB, Twitter, etc. store your data? Then why should you care how they export it from Y to X?