We are on June 7 2015, with PS4 still in the second year with massive sales, and we expect a new PlayStation in 2018 to 2020...
Is not easy to say, but i think is gonna to be funny
did you imagine how can be coll this necrobumb in 2025/2030 ??? (if we are still on VGChartz...
)
So, even if is withouth doubt a random prediction, withouth any information, and we don't know how will be the industry in 2020... what's you think? xD
Is going to be the most successful ever since PS2, or the worse flop since Atary Jaguard? All is possible for now. 
I will go with 70 million. A TOTAL RANDOM PREDICTION.











