I've just download the 2.8 and can't find the, I think it was the local button that was next to the layers in the 2.7x to enable different layers per viewport, and the "/" button of my keyboard doesn't work neither, are these features removed or have they changed the shortcuts?
I'm guessing they took it out, since its functionality was a bit redundant. You can accomplish the same thing with Shift+H to hide everything not selected. I noticed they also seemed to have removed the box hide functionality, also redundant. It could be part of the larger effort to streamline the UI, probably a good thing.