So back in September there was this article:
https://media.rakuten-sec.net/articles/amp/28834?page=2
Where an analyst predicted that PS5 would sell 200M units lifetime citing things such as PS5 being the replacement of PCs for eSports.
Now there is a new article about that same analyst that has changed his prediction:
https://www.sbbit.jp/article/cont1/44665?page=2
Note the following is machine translated:
200 to 300 million units:
Mr. Norio Imanaka, Chief Analyst of Rakuten Securities Economic Research Institute, predicts that the number of units sold worldwide will be "200 to 300 million units in 5 to 6 years."
eSports:
"Esports demands hardware that is fast and capable of advanced video processing, not only for professional gamers, but also for amateur athletes and spectator fans. The high-spec, low-priced PS5 is for today's games. There is a possibility that it can become an international standard machine for e-sports instead of a personal computer. "(Mr. Imanaka)
700 million units long term, 4-5 times that of PS2 lifetime sales:
The data suggest that in the future, the number of PS5s could reach the order of 600 million or 700 million, four or five times the number of PS2s, which was the highest number ever for home video game consoles. Mr. Imanaka said, "If the number of transfers from PS4, which is backward compatible, is about 120 million, and if more than 100 million e-sports competition population and 400 million spectator population are added, PS5 will be 6 in total. It can be a market of more than 100 million units. "