I think congrats are in order seeing as some people though the PS3 would struggle to sell more than 6-7m by the end of 2007.
Yes 10m is more of a benchmark and it should be reached within the next few months.
Prediction (June 12th 2017)
Permanent pricedrop for both PS4 Slim and PS4 Pro in October.
PS4 Slim $249 (October 2017)
PS4 Pro $349 (October 2017)