This is a new feature, which is available for all existing online licenses (Yearly and Event licenses)
Basic idea is that you can purchase one licence and use it on as many computer as you like, but not at the same time
Limitation is that, if you assign licence to computer A, you need to wait 12 hours to move it to a computer B (since the moment of assigning the licence)
For example, if you assign a license to computer A on Saturday at 9.00 AM, use the application all day long, you can move it to computer B on the same day after 11.00 PM (since there is a 12 hour buffer)
This is a great solution, if:
your primary computer dies and you need to move the licence to a backup computer
you have two production units, one working on Saturday, the 2nd one working on Sunday