'the only people who think that nostalgia is bad are little kids and casuals. First ones because they don't know what it is, seconds cause they are barely touching the surface,'
As a 37 year old gamer, I can tell you that that's not true. The problem with nostalgia is that it doesn't equate to progress. Japanese gaming is falling by the wayside in the West because of their obsession with tradition and - you guessed it - nostalgia. Japanese role-playing games, for example, have ultimately changed very little in the 26 or so years that they've been around. Ni No Kuni, Eternal Sonata, FF13 - they follow the same overall formula(s) that JRPGS have been following for years. Japanese gaming is in a serious rut, and it's mainly due to the lack of true innovation that stems from a love of tradition, conformity and nostalgia.
don't even start. If you blame JRPGs for being innovative look at west games. Thousands of generic shooters that improving nothing but look. Crysis, CoD, Halo, it's all the same kind of crap, that's being published over and over. AC becomes new entries every year without big changes. GoW has 6 games that are basically same. West is basically one giant pile of sequels to milking franchises, and even if anything new appears it chocked by giant crap piles like AC. So before talking about "nostalgia" look objectively on west front. BEcause it looks as crap right now.