Digital film is also more convenient when you are in the field. Right now, we tend to prefer CompactFlash because of its ruggedness. But the need for this ruggedness depends on the camera and how it will be used. Furthermore, no vendor currently offers a choice of digital film in the same model, though some use different storage options for different products in their line. Consequently, when you choose a camera, you are also choosing a digital film standard.
Price is likely to be a more important factor.
We think digital film is simply too expensive right now. Cost is especially important in cases where people want to store and transfer large images. If you can buy, say, a 40MB CompactFlash card at a cost-effective price, digital cameras make more and more sense. At the same time, each memory manufacturer is trying to make its particular format the industry standard. Standardization would certainly help users, but it is unlikely to happen anytime soon.