libre arm vpu software

https://www.kickstarter.com/projects/bootlin/allwinner-vpu-support-in-the-official-linux-kernel/description

It appears they are going to provide libre vpu software for a lot of
orange pi computers. The orange pi computers in question will
then be able to work on an entirely libre software armbian version,
expect for wifi devices?

What is the difference between a gpu and a vpu?

Thank you.