Post-Punk Revivalism is a type of indie rock that emulates the sound of Post Punk bands of the late 70s and New Wave bands of the early 80s. They feature a more artsy, complex sound than other branches of indie rock, and often add synthesizer or other electronic sounds to the traditional guitar, bass, and drums. Post-Punk revivalism started in England in the early 00s and, while it is still strongest there today, it has grown in popularity in the US, Australia, and Canada.
Post-punk revival, in my opinion, is the best music of the new millennium. It's a movement that started in the late 90's and continues today. Bands in this genre draw influences from the original 80's post-punk bands, and they also have a britpop feel to them. Hopefully post-punk revival will continue to grow into the next decade.