Yes that is going to be a major change and a lot of documentation will be heavily simplified (this will be done at the same time as the release itself).
I am not actively working on it, so I just have a high level point of view:
Breaking change are going to be kept at a minimum, so current code should keep working as is.
If you look at the current PR on the github repo, a lot of them are working on this change.
The main idea is that Variables are going to disappear from the python world. Everything is going to be a Tensor, or in nn a Parameter. And then the rest of the code is going to work as before, you won’t need to wrap things in Variables anymore.
For more details, I would advice looking at current PR that are made and asking here again so that people that know the details better can answer.