I've been on LR 4/5 for years, and have never upgraded to CC. I'm thinking of doing that but am wondering about all my presets. I've got a bunch of VSCO presets that I use often. Will these automatically install when I upgrade? Or will I need to go through and install them again to see the changes in my photos?
Every upgrade I have ever done in Lightroom, my presets show up in the new catalog file.
Your presets will be fine.
The only "problem" that sometimes happens is that the upgrade will create a new catalog as it migrates your old data. If you have your presets stored with the catalog (not recommended, see the Preferences dialog), then the new catalog will not have any of your old presets.