I probably do far more wave file and mp3 work on the pc now than midi. Far more possibilities and fun. The software samplers and looping arrangers available are amazing.

The next big area of expansion is video. A dvd can be compressed down to 2 cds in mpeg4, and then viewed on your handheld personal digital assistant.

Midi is getting to be a little old hat in comparison. But there's still nothing easier than pressing easy record and off you go...