Tristan Louis has put together a couple of tables comparing the new 15 inch MacBook Pro with the old15 inch Powerbook G4, and the MacBook Pro with the similar Acer Travelmate 8200. Onthis, he concludes:
This table does not seem to favor Apple. On a feature by feature basis, it seems the Acer beats. In the categories of CPU, screen resolution, memory, hard disk space, video memory, and resolution on the video camera, the Acer comes ahead. The same is true in terms of ports (S-video, TV-out, 4 USB2 (vs 2 on the MacBook), more audio ports, etc...). However, when it comes to weight and size, the Apple machine is much slicker. The MacBook offers a backlit keyboard but the Acer offers a modem. So if it's style you're after, the MacBook is your machine but if you're aching for raw power, another option may beat it.