Re: increase in euro cars over past 4-5 years.
Yes, I completely agree with TSIVipul. This is also the case in Faridabad, in 2010-2011 when the BPTP Housing project was started in Greater Faridabad, 50% of the villagers in that area had Swifts and Bullets, while the rest half was still managing on cycles and Crux'. In 2011-2012, when the land was acquired by BPTP for their construction site, one could easily see 3-4 luxury cars (Audi Q3 and A4 being the most common) and lots of Fortuners going up and down the village roads everyday. The villagers themselves agree that they recieved a fat payment for their land, and some are still holding their land to sell privately to a third party as the prices will rise once the society starts to build up (else their payment from BPTP will get higher).
In fact, my friend who owned a Santro (8 year old) until last year got himself a Fortuner AT, after he got the compensation from some housing society which had to construct a master road (and his land/plot came in their way).
Rise in income is another major thing, and the offers provided by luxury brands from time to time is another great thing for aspirants.