There's currently a "small donor boom" on the Democratic side (possibly Republicans too, I'm unsure). Super PACs etc are fading in importance, in this cycle at least.
Yeah, they say that every election cycle. Remember Ron Paul? Bernie Sanders? Remember the "small donors" for Obama? Nobody remembered them and neither did Obama. Super PACs are growing. Not sure where you got the idea that they are fading. Super PACs are only a few years old and they have tons of room to grow.