Not the PC
The only problem with the idea of Microsoft's "but we don't just make PCs work" spiel is that they have yet to make any money from anything that's not PCs. Servers only exist to make the PCs work. If you aren't adding PCs then in general you don't need to beef up your server fleet. *
Microsoft can sure sell XBoxen...but they don't make money here. Mobile phones, Internet, Zunes, or other such endeavours? Larf. Diversification is irrelevant if you “don’t get it” in any non-PC market so very badly that your repeated failure has become an international dinner-table joke.
Sorry Microsoft, but you only get one “The New Coke.” Repeated “new cokes” arent’ diversification. They’re sending good money after bad.
*Allow me to qualify this. You do tend to beef up just servers and not PCs, but rarely is it Windows that is involved. Normally when we are talking Servers Only we're talking Linux, Unix or big stonking Oracle/DB2 databases.