[woodpanel]

Sounds like a new product idea for services a la "login via apple-id/windows/google/...". Name it something like "send session to..."

[tossandthrow]

The issue, as also described in the comment, is that it is a hard no-go to assume that the user is logged in on the same device.

It is a shame that the family computer does not exists anymore - a place where you can't just assume that the same account is logged in on related devices.