Prediction: PS6 won't sell over 50 million units lifetime.

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TheRealSamusAran said:

I was thinking there was no way it can sell under 20M, but then I remembered that the Wii U happened. And that was right after the Wii success too. So it's definitely possible to see the big 2 hitting those numbers.

Sony already hit those numbers with the Vita too.

Personally though I feel like Xbox One/3DS numbers are more likely if it does end up costing a fortune due to the memory crunch.