Last Gen Sold 280m Consoles. How much will this gen sell? Predictions

[Augen]

Way lower than last generation

Wii - ~100 million to Wii U - ~20 million
360 - ~90 million to X1 - ~50 million
PS3 - ~90 million to PS4 - ~ 115 million

Total - ~280 million to ~185 million

This is under the assumption that total console sales for this generation will follow 6 year model.