It would allow languages that use JS as a compile target to skip that intermediate step and output bytecode for the VM, but as I understand it would also allow

It would allow languages that use JS as a compile target to skip that intermediate step and output bytecode for the VM, but as I understand it would also allow Javascript to skip that step. Right now every client needs to JIT compile and optimize all code, but if a compiled blob could be sent down instead of minified code, it would be a pretty dramatic shift.