Speaking only from the economical point of view, I see the following upsides:
1. Expanding demand: we all know that at the root of any free economy lies the current demand. There can be little doubt that organized retailers expand this demand to a significant extent(how often we return from a mall wondering how could we spend twice the amount that we initially thought of), now from an individuals perspective, it might not be that good, but its good for the economy. People are trying out more and more products and are willing to pay a price if they get what they want.
2. Employment generation: No doubt there is a big debate going on organized vs unorganized and the resulting job losses. But just think of the better quality of jobs that organized retail can generate, the growth/training potential and the fact that it can provide the biggest job avenue for our large educated young generation. The future of this nation lies in the hands of that generation. Even the ICRIER report suggests that the magnitude of job losses in unorganized sector is much less(<2%) than we usually think of
3. Process improvement: Just imagine what Maruti could do to our four-wheeler industry. Today its globally competitive because of what Maruti started some 3 decades back..it brought with itseld a whole new culture of process improvement and quality standards. Same thing will be witnessed with the entry of more and more globally competitive platers in India
4. Infrastructure and related improvements: retailing is not restricted to itself, there is a whole cycle of positive impacts on various other industries, the most prominent of them being the Infrastructure.
If you are interested you can find a very relevant and much detailed article at retail rise at
Impact of organized retailing on our economy | Retail Rise
I particularly liked the demand expansion argument that the author linked with the Shampoo sachet industry evolution in India some 2 decades back.