Time will change things...
According to figures by VGChartz, Modern Warfare 3 sold a total of 9.3 million copies on launch day making it the biggest industry launch of all time!
The Xbox 360 version had 54% of the sales,
the PlayStation 3 version had 42% of the sales,
while the PC version and Wii version combined had the remaining 4%.
As a whole, Modern Warfare 3 is up 33% over Black Ops first day sales, and up 55% over Modern Warfare 2 first day sales.
...so, not buying another CoD for PC platfrom will not change their (the Dev's) mind about how to make MW3 serie like the PC gamer community wants to have it! Also, do not forget the console fellow players... these games must work for all platforms out here!