digital releases are relatively new as the primary platform for game sales. So this isn't some long-held record that's been broken finally.
It's also FF7. Their most historic entry of the series.
Nothing about this is shocking information.
This popping up now does prove one thing though: the FF7R numbers getting boosted because people are going through and playing in prep for Rebirth's release. Only reason this news pops now. And that's a bigger deal because it means good things for the outlook of Rebirth's reception.