No, becaus macs and especially the latest desk lamp version are overpriced, overhyped and just plain crap with their proprietary OS. They are commonly referred to as crapintosh's or macincraps. They still crash more than winXP or win2000 machines and they don't play well with others. The macs can't raise the productivity by themselves and considering their lameness in realworld client-server and mainframe/midrange (yes, there are still a load of mainframes out there crunching)and other networking issues they remain CRAP.
Ah, another knowledgable PC user enters the fray...
...proprietary OS... = BSD UNIX with an elegant GUI
...latest desk lamp version = Several other models have been released since the iMac... such as the $794 17" flat screen G4 eMac... and the new Workstation class G5s
...don't play well with others... = simple connection to Windows and other networks and award winning networking tools.
...still crash more than winXP or Win2000... = statistically untrue. UNIX is a much more stable than either windows environment.