Keep smoking that weed :)
nah seriously, a couple of factors could would help massively.
1. MSFT retreating from markets where it is not selling at all well (was going to say europe minus uk & japan but i think its pretty much the world minus US and UK).
2. Strong line up
3. Price cut in run up to xmas 2015
4. Snowball effect of breaking through 50% of 8th gen.