Meet Milton Paint: "Draw without pixels, infinite detail"
The purpose of Milton is to let you make art with your tablet without thinking about pixels. Whether you are painting a mural or a post-stamp, Milton lets you just paint!
When doing sketching or painting, it's a real pain to choose a resolution before doing anything. It's even worse to later having to deal with not having enough detail, or when you have to export to a very large size and it looks pixelated.
The point of Milton is to let you just focus on painting. There are no pixels. It's currently in development; coming out on Android soon, and on iOS soon-ish.