Tim Cook had plenty of reason to celebrate during today's Apple earnings call -- and really, who can blame the guy if a bit of that celebration spilled over into some old school executive gloating? While talking up the company's impressive iPad numbers -- and the inevitable PC-eclipsing nature of the space, Cook let this bomb drop, There is cannibalization of the Mac by the iPad, but we think there's more cannibalization of Windows PCs by the iPad - we love that trend.Yep, the iPad may be eating away at the company's computer busi