Never going to happen. Part of the reason why PS2 was so successful was because it was introducing a new medium to mainstream audiences (DVD). Many people bought a PS2 specifically for a DVD player. I know I was one of them. I purchased a few games for it but I think I played a total of 2 hours of games on my PS2 for the last couple years I had it. It was a glorified DVD player for myself and a lot of other people.
PS4 can hope to sell around 100 million lifetime. Sales in Japan will be lucky to be half of what the PS2 Japanese sales were and it will be for NA with Xbox One all generation.







