It will probably sell 7m+ now but if Sony can get the price down it could be more. Currently in my countries gamestop it's on sale at €179 from €199.
If Sony can somehow get a wireless version sold at €149 and on sale even lower this thing has market potential. €99 the sweetspot and then obviously buying move controllers etc would be extra.
The tech is there and with the ps5 the processing power will be there too. The entry price is the only mass market barrier.
Regardless sales are good anyway. I'll jump in probably in 2021 or 22 when I have a ps5. Looking forward to it.