The next version of the popular single-board computers will be manufactured on a more advanced FinFET process, but it won't be any smaller, according to the CEO of the Raspberry Pi Foundation. The Pi 4 will still cost US$35 though.
https://www.notebookcheck.net/Raspberry-Pi-4-The-new-single-board-computer-will-cost-US-35-and-could-be-based-on-a-28-nm-FinFET-process.407666.0.html