What would you call your feeling when everyone from a place you just arrived which is your homeland right from your neighborhood to TV channels is excited for newly launched car models like Audi A8, a toyota cruiser, range rover sports etc and you see advertisement everywhere while you are ok with it since it has become so common to you that you don't feel like discussing even sometimes feeling like giving them a lesson or two about the glitches and design flaws in these cars and you aren't into automobile business in anyway (neither designer nor sales men). You are a commoner. Just that your current country of residence is well a developed country while your home country isn't.
PS: car examples are hypothetical. Its a generic feeling for anything you knew before everyone else and you are like i am about to steal their thunder, shall i or shall i not coz i will appear bragger.