Here I will talk very lightly of what I think will be the music genre trends for this next decade, that started in 2010.
In the early twenty tens (2010-2015), I think we'll basically see a continuation from the trends started in late 2000s (2005-2009), with genres such as Wonky Pop, Trip-Hop, Glitch-Hop, Grime, Dubstep, Wonky, Electro-House, Fidget House and Electroswing increasing their momentum and continuing their mainstream appeal, with the exception of Alternative-Hip-Hop, which will also continue its mainstream appearance, but has emerged in the 1980s.
I believe these are the most likely genres because, having started my video on mapping the music genres created during the 20th century, i've noticed how there is a certain 'decade-lag' between fresh new genres/subgenres and their popularization.To give you some concrete examples, Rock&Roll emerged in the 40s, but only gained more popularity in the 50s and 60s. Garage Rock appeared in the 50s, but only gained more popularity in the 60s and 70s. Heavy Metal appeared in the 60s, but only gained mainstream popularity in the 70s and 80s. Same goes for Disco music (also from the 60s).
Even in more recent years, genres such as Trance, Drum & Bass, Post-Rock and House music, even though coming from the 80s (in the case of House and Post-Rock) and 90s (in the case of Trance and Drum & Bass), only became mainstream during the 2000s.
In the late 2010s (2015-2019), and this is even more subjective speculation, I believe some genres, with their roots in the 2000s, will start to grow in popularity. These genres haven't been featured in my video about the genres created during the 2000s, as there is no wikipedia entry on them, but I believe there is potential.
Orchestral Drum & Bass (Incorporates Drum & Bass with Classical/Orchestra music)
Progressive Dubstep (slowly building dubstep)
Steampunk (Music that combines genres from the victorian early and 19th century set in a retro-futurist environment and adding contemporary music and some punk rock elements)
Steamwave (Same as steampunk except adding more synth elements and new wave music)
Dieselpunk/'Dieselmetal' (Music that combines genres from the time period between 1920-1950, including swing, big band, boogie-woogie and cappellas with contemporary music and punk rock elements, as well as some heavy metal elements)
Dieselwave (same as dieselpunk except adding more synth elements and new wave music)
That being said, it is unfortunate for me to anounce that my 'sourced-wikipedia-source-based' video on the genres of the 20th century, which i had completed already until the mid 1980s, will have to be postponed for quite a while, as my windows movie maker has accused an error which doesn't let me publish the parts I had already completed, forcing me to redo everything from the start.