I wish to see VSC launched and integrated by existing apps and new apps created especially for it. Time is precious. It's important to make the most of it.
I'd have other wishes, but I wanted to put here what I believe could be the most impactful.
I don't know what impact the launch of VSC will have but I think that it would be great if things would be ready to use and offer more solutions for apps and games.
The launch itself... not much. Although they will probably have their own app to give people a taste of their features. Integration in existing apps (i.e. front ends, mostly) will probably have the most immediate significant impact.