Each decade in the past seems to have had its own theme. The roaring twenties...the sixties, that 70's show, the 1980s/MTV, etc.
That seems to be gone--it's all a splage now.
'90s -- Good economy, Clinton, pagers, Web 1.0, grunge & gangsta rap.
'00s -- War on terror, Bush, cell phones, Web 2.0, post-grunge & crunk.
'10s -- Terrible economy, Obama, mini-computers that happen to have phone capability, grandparents on Facebook, indie rock & electro-pop.