Some people enjoy the simplicity that the Palm's grayscale screen provides. I suppose the best of both worlds comes in the Palm IIIc. Take your pick, color or grayscale, but don't knock either one until you've experienced each one. When holding a Windows CE PDA and a Palm in both hands, it's obvious that there is a significant difference in the weight of the two. The Windows CE PDA's have more multimedia features and other hardware add-ons that contribute the rather heavy form factor.
Thickness is also an issue.
The majority of Windows CE running organizers measure 15-25 mm thick, compared to the Palm IIIe's thin 12.7 mm casing. If 3com crushes Microsoft in one area of PDA's, it would definitely be battery life. Even the latest Pocket PC line's batteries only last a day or two, tops. That also includes mediocre usage of the media player and third party software. The Palm series, on the other hand, will last on average two months before new batteries are needed.