And in 50 years people will easily pick 100 great songs / movies / games from this decade
Like...what? Where? How? The 2010s have passed. So why not begin now? I'll grab the popcorn.
Games you will struggle unless you have terrible taste and standards. Movies you will struggle. Music perhaps a little easier (and more subjective), but most genres have been pushed underground, only a few forms of homogenized shit is allowed, which is heavy decline all in itself.
popular music used to consist of: typical pop (power ballads, goofy songs, boybands, love songs etc), reggae, D&B, trance, dance, rock, disco, hip hop, R&B, metal, indie, punk, etc etc. In each era a particular style or two dominated, but it wasn't like this.
Now, there's a very narrow range of music shoved down your throat whenever you leave your house, turn on the radio, get slapped in the face with an annoying advert etc. And that range consists mostly of horrible garbage. It actually irritates me to go about my day when wherever I go hear this complete garbage. It's noise pollution to me.
Everything seems like decline to someone who grew up with it being different. In some cases they are right and in some cases they are wrong. The entire gaming industry not being peak cRPG and immersive sim goodness doesn't mean gaming is over.
I like many genres. Not just RPG or its subgenres (Im Sim). All the many genres I like are dead or in a state of decline.