I agree - although I think Affinity (and Sketch and Pixelmator) might not necessarily displace Adobe's design apps, but rather dent their market share.

What's nice about the Affinity apps:

- they are cross-platform: Windows and Mac (unlike Sketch and PixelMator)

- they are not subscription-based (like Adobe)

- they cover vector (Affinity Designer), Raster (Affinity Photo) and DTP (still-to-be-released app)

- they are much more affordable than an Adobe Creative Cloud subscription

- they feel faster and much less bloated than Adobe's apps

However, the sheer amount of tutorials and design assets available for Adobe apps means that Adobe will remain popular. And there are some apps like After Effects that simply don't have any serious rivals.