I'm no expert on dubstep, but basically the current dubstep wave is pretty different from where it started out. The beats are similar in rhythm, but the basslines changed from deep and subby, stuff that you can barely hear on laptop speakers to those high, overdriven, modulated and aggressive basslines ("Brostep"). It's origins are deeply rooted in the UK scene. Some english producers started to do these more aggressive basslines (Rusko for example) and things got turned up to 11 by american producers (like Skrillex or Nero). It started with stuff like thisVIDEO VIDEO Got more aggressiveVIDEO And then developed into the current wave like Skrillex.VIDEO The original dubstep wasn't very popular in europe outside of the UK, however, the brostep sound is also very popular now in Europe, especially with a younger crowd, from 16 - 25. Basically dubstep went UK -> USA -> Europe/Rest of the world. To me the current dubstep sound is electronic music for people that don't normally listen/dance to electronic music, but I'm a bit of a snob.