Hey Suneet!
This is a really interesting idea for an app. While I don't personally have any practical use for this, as I only have test shops on Shopify, I believe this might be a good idea. The only trick would be somehow having a network of stores that agree to cooperate. Ecommerce is inherently very competitive, and so having this kind of partnership between stores could be very interesting to see.
I look forward to news about this app.
Matthew Buttler
Guru
Shopify Inc.