I'm gonna wait until how this pans out. not all upgrades are good(looking at you Youtube and Deviantart).
I just noticed this today. Nice find.
I like the way the store page looks, the colors are lovely and can allow for greater contrasts. The only downside is that everything else looks comparatively bland.
Now Steam has clear warnings for 3rd party DRM, early access, whether or not a game is in your wishlist/library. You can also open pages in new windows, which is incredibly convenient.
I think the curator system is a very interesting addition and makes it a lot easier to get recommendations from people whose opinion you respect.
The only thing to do now is wait for everything else to turn blue.