Will new driver signing be needed file file system filters?

I just read Peter V’s blog post about new Windows 10 driver signing requirements. http://www.osr.com/blog/2015/03/18/microsoft-signatures-required-km-drivers-windows-10/

I can’t tell from documentation that I’ve read if this new requirement also applies to file system drivers and filter drivers. Does anyone know, or can point me in the right direction?