Therefore it is likely that XBO will fall behind XB360 in 2018.
XBO has never sold 5 million units in a year in US and yearly sales keep declining year after year since 2015.
Truth to be told I'm wondering if XBO will reach 4 million units in 2018.
Xbox One sold 4.95 million in 2015.
2018 is a pretty significant year for Xbox One. It is like 2017 for Ps4.
The console family is now complete for the full year. The arguably best first party lineup this generation (assuming Halo 6 or something other Halo related will launch) and third party will be strong, too.
If Xbox One does sell below 4 million, i will donate my Xbox One X, because the platform is in deep trouble. 2018 needs to be a bounce back year. Obviously not as great of a bounce like 360 had.
But being up close to 20% YoY over the low(est) 2017 sales should be achievable.
X360 had a > 40% YoY increase thanks to Kinect and the Slim Version for comparison.
edit:
fixed a typo!