Many claim that the fourth wave is imminent, ready to appear anytime between now and the early 2010s.
Others claim the 4th wave is already here, heralded by Tomas Kalnoky's band Streetlight Manifesto and side project Bandits of the Acoustic Revolution. (There is a streetlight manifesto song titled "riding the fourth wave")
Fourth Wave includes a larger horn section and string section.
Still cool anywho.