While not explicitly stated anywhere - yet, I think it's safe to presume MQMs will continue to be calculated for distance in order to credit to MM status. Being MM will now only accrue
based on BIS (butt-in-seat) miles flown (no class of service bonuses or CC spending boots, etc...), maybe they will call it something else in order to "retire" the MQM name and simply call it "Miles Flown" or "Distance."