I'll agree with most of that, but I'd shift the date to around 1995 or so. Pearl Jam, Nirvana, STP, R.E.M and Soundgarden made plenty of great contributions to pop in the early to mid 90s, before boy bands took over the entire genre and turned mass marketed garbage into the golden standard of pop we know today. But at least in the late 90s, MP3s revolutionized the way us non-top 40 listeners were able to discover and enjoy music, so I'd say the 2000s at least kicked off a new wave of "indie pop" that has some staying power. Ultimately it just gave us more variety, which, ironically is one of the things pop music lacks the most.She's a famous pop star today, but her music won't last.
Very little music so far from this century will stand the test of time. The period from 1990 to 2016 is the most barren in quality since pop music first appeared.
Taylor Swift is basically the backlash to the shift in music consumption trends that threatened/s the RIAAs precious business model of heavy promotion of a few key artists in order to drive sales. Essentially they went all-in on her and played up the whole "regular teen girl makes it big - Cinderella story" while the industry constantly lauds her as the greatest accomplishment in music history. Her latest album features several songs written entirely by a few industry-insiders from the Netherlands who can be credited as far back as the earlier mentioned Britney Spears/Backstreet Boys era.
People can call it jealousy all they want, but it's only natural to envy the riches a select few people "achieve" through modest talent and a WHOLE BUNCH of sheer luck and artificial support. I for one have no problem admitting that I wish my life and the lives of several future generations of mine were assured extraordinary decadence simply because some key executives happened to see a video I uploaded to the internet.