Imagine the embarrassment of the Adobe master on the stage, the harddisk just went south and refuse to work (the OS was corrupted).
That is because OsX is built on top of BeOS which is another favour of Linux.
OsX has a stronger sandbox than Win7 but not as tolerant when having an improper shutdown.
In regardless to any system, when you introduce more rubbish applications, your system gets more unstable.
I can have my i7 laptop with 6GB ram (16GB coming soon) and ATI HD5850 sit beside your Mac Pro for a comparsion if you would like but does it make sense... no.
So TS, I would like to say a MacPro has higher resolution than most laptops of its size, I think the iCore series doesn't use IPS panel else it's less calibration for you.
For that, there is an increase in price and you also have to pay for the cool design.
Wintel laptops gets you top of the line machine specifications for the same price as a MacPro but you still get crappy LCD until you hit $2.3k where you just get ugly laptops that are mostly desktop replacements or SSD druggies.
So it's a choice between the lesser of two evils, your call unless your next thread is iMac vs PC...