even after the reunification, unemployment was still rife in the East, because there weren't any major redevelopments; even today, in some Bundeslaender, things are as they were when the wall was up.
Of course, you can talk about the day to day things that changed, too - even to the point of what happens in the film "Good Bye Lenin", where the cultures mixed. Western clothes appeared in East Germany, but not vice versa. Lots of products were no longer sold in shops, like Spreewald pickles, to name one. As such, there sprung up new areas of collecting - paraphernalia from East Germany, known as "Ostalgie".
Potentially, the neo-Nazis are popular in the East because while the wall was up, there were negligeable, perhaps non-existent levels of immigration into East Germany, as opposed to West Germany, which boomed and benefited from it. As such, a lot of the middle aged and older Generation remember what it was like living without foreigners, and have passed these beliefs down to their children, who are happy to dislike foreigners and minority groups, especially vis a vis the levels of unemployment.