My problem with all these western fast food chains is, when you have awesome street food available, why would I choose Mc Aloo tikki over samosa???
I can see starbucks taking over, because they provide an additional value to the coffee drinking experience, as compared to road side chai wala. But for food items - they have to adjust a lot, to give additional value.
I can think of only thing that is hygiene - apart from that it doesn't gives any value.
BTW...the best street food is from Kolkata. Just awesome food and real cheap prices.
Delhi my friend thats where it is at- specifically Old Delhi.