Microsoft sold 100 million licenses of Windows 8 in its first 6 month on the market. There will be plenty of debate if this is a good or bad number, however this is exactly the number of Windows 7 sales after 6 month.
Windows 7 was welcomed as the “hero” after Microsoft’s PR debacle Windows Vista. Windows 8 is welcomed as – let’s face it – not Microsoft’s best product ever shipped.
(I disagree stringly with the notion in both cases, Vista is solid and a good OS and so is Windows 8 – the negative perception of both of these OS' is all about PR and Marketing)
No matter what, 100 million sold of anything is a big number!