Anywhere from 120M to 150M+.
The PlayStation 5 has more demand than the PS4, maintaining their lead in major markets as well as growing in developing markets, while the Xbox Series consoles & GamePass isn't as disruptive as many predicted. I think the path is paved for PS5 to sell at least 120M lifetime. Exceeding past that total will depend on how proactive Sony is with discounts/price cuts at the end of the PS5's lifecycle.