I wonder if this also means ChakraCore would be abandoned. I haven't played with it directly, put it seems to be a very capable JS runtime, which has no home outside of Edge. Well, there is node-chakracore, but I wonder why Microsoft would interested in keeping that effort.

Unless... they replace V8 in their Chromium build with Chakra. They already have a V8 API shim, so I guess that would be within reach.