My guess, and I hope I am wrong, is that it might be a world of pain for backend/cloud developers.

Virtualization gives us Linux ARM docker images, which is nice, but not the same as running the same Linux docker images that run on the cloud. (while ARM in the cloud can be an option, it is a whole different topic)

The developers will have to find and develop with the ARM equivalent docker image of their production x86 ones, which will make the local dev and production environment unnecessarily more distant.

The good news is that the Docker ecosystem has a relatively broad ARM architecture support, but still, this will be a significant difference with prod environments.