Desktop - Gaming - AMD Athlon 64
Laptop - Office Applications - Intel Centrino
They each have their place. If I were doing Multimedia editing, I wouldn't even consider an AMD, but for gaming, they rule.
Also, as far as laptops/notebooks are concerned, the Centrino's are by far the best. 6-8 hours on a single battery charge, integrated WiFi, dynamic CPU under/over clocking... They'd suck for gaming, but does anyone play games on a laptop.....
Companies generally choose Intel Pentium systems because they're the most reliable.
RoD