A best case scenario is that we rejuvenate the place. But I know pinds, they are seriously averse to any change. So I guess most of us will gravitate towards towns.
Having worked with many desis over the years, I think that us refugees would have serious problems with finding employment, and that resentment desis have towards vlathees, will be at play for most of us. We'll be the targets for all the 'one upmanship' crap. I think the cultural differences will make us frustrated.
That being said, we may cause cultural change to accommodate our tastes and have various cafes and restaurants opening up for instance. Maybe the standard of English would improve as some of us could work as teachers. Some progressive international businesses might hire us for our accents to talk to other companies in other western countries. I mean I imagine the skill set of Panjab would shoot up dramatically because of it, but I don't know how that crabs in a bucket mentality would affect us?
Leaving that aside, say it was a Jew/Holocaust situation.
I mean in an idealistic world where Sikhs were more united, how much power/influence would they have in Punjab and India and how would India as a whole , react ?