I think it's too early to say right now. So let's see it do so first.

I think it may get to 100 million, but won't pass PS2 (156+ million). PS4 would have to start selling 23-25 million yearly for the next 7 years to get there. At best, PS4 will sell an average of 16-18 million yearly. Also, I don't think this generation will be as long. When PS3/Xbox360 came out, the consoles were much better than an average gaming PC. This gen, the PS4 is just on par with an average gaming PC (Xbox1 much worse), so I think the PS5 will probably come out within 6 years.

PS4 is powerful enough for everyone, with the diminishing returns and all. Now hear this, what if PS4 lasts for like an eternity? The console to buy for the next 200-300 years. If it lasts more than a few generation (human generations), I think we can see crazy stuff like more PS4s out there than human beings. Sounds crazy, but it is possible.

I'm wondering about one thing I have not heard/seen Sony comment about the PS4. I remember that when the PS3 came out, they said that they would support it for 10 years. I did not remember hearing the same statement from Sony on the PS4.

If my upper comment is true, then I believe that the PS4 will have to pass the PS2 (sales) in half the time that it was in the market. I don't think the PS4 will have a 10 year cycle. 7-8 years is what I would give it. Technology is rapidly moving and people will dump 2k once 4k is cheap & VR may come into play.

This is all speculation on my part, but in order for Sony to keep up with the demand with graphic whores, it may just have to cut the life cycle down a few years to allow possible 3 screen display/VR/4K resolution gaming.

Edit for grammar reasons.

There's a long ways between 5 and 150 million.

Seriously, Spurge. What's up with you and these sensationalist threads, lately?

In fact i think they could be.

PS3 took years until it started to give any kind of profit, xbox loosing 2 bi for microsoft and Nintendo out of touch with the market, and paying for this.

Developers are also on a similar boat, millions spend without any assurance of return, some reporting loses or really low profits.

3DS losing to ds, even with VITA being dead. VITA being dead.

I am not sure the industry is sustainable at all.

atleast 200 million! (Six years later necrobumps this thread, I'll edit it to 250 )

Extremely unlikely. But why make a prediction for something that won't happen for almost another decade.

I won't say it's impossible.