If you just want to try Vue 3 out - you can do it right now with Vite. Vite (https://github.com/vitejs/vite) is a new dev/build tool that we created that is lighter, faster and produces smaller bundles. It works with Vue 3 out of the box.

From https://github.com/vitejs/vite:

Vite is an opinionated web dev build tool that serves your code via native ES Module imports during dev and bundles it with Rollup for production.

I wonder if Vite/Rollup will end up replacing vue-cli/webpack in the Vue community.