Adding this post to consolidate the opportunities for innovation. I intend to keep this entry active for ever and others are welcome to participate in increasing the list.
Personal CRM app: Help you manage your contacts intelligently and generate insights.
Shoppers Wallet app: Allow users to share the shopping items along with traces to the store and better offers.
Mail Merge in Gmail: Allow mail merge option for gmail contacts.
External keyboard entry for Mobile Apps: In case you are on your laptop, mobile apps should be accessible for keyboard entry. I amy not prefer to go back to whatsapp for replying the messages.
Speech recognition from hangouts and targeted ads the next time user logins to the G+.
Market Place for Skill: Something like skill swap. In between Quikr and Craigslist. Shift to market place (or mandi) model.
Cross Sell: Tie up with complementary product companies. If a person has bought microwave, send a voucher for microwave-safe bowls or eating items.
Intelligent CRM: Price & Discounts based on how frequent customer is on the online store.
Social Commerce: Introduce social commerce (via Facebook)
Collective buying through eSales Shop (Collaborative consumption): For remote places, setup franchises with online access and collective buying patterns.
Last Mile Delivery: Open a warehouse and become a shared service provider for all eCommerce Players for last mile delivery. Alternatively, tie up with Petrol Pumps from where customers can pick up at per their convenient times.
Reverse Auctions: Introduce Reverse auction for services.
Smart Move: Help you organise the moving with tags on boxes and inventory list, GPS etc
Collaborative consumption for insurance: Collaborate for group buying of insurance (like companies do for their employees). Negotiate with insurers on group quotes.
SpaTaxi: Taxi with a Spa – If you are tired after a long flight or shopping, relax on your way back to home in our SpaTaxi.
Swap Toys: Option for parents to donate toys or swap for something else.
OmniChannel for Retail: Why should I be able to add items to the shopping cart from the online portal only? Make it accessible through all channels – online, social media, partner portals, ads.