Paul Buchheit writes:
Product ideas can be divided into three categories:
1. Obviously good ideas that are very difficult to implement. Efficient cold-fusion, flying cars, and a lot of other sci-fi ideas fall into this group.
2. Obviously “good” ideas that seem possible but haven’t happened yet. Video phones and HDTV were in this category for a long time. I think this happens when people get excited about technology and overestimate the benefits (and possibly underestimate the cost). I just don’t care that much about having a video phone.
3. “Bad” ideas. Many of these ideas are truly bad, but some of them will in hindsight turn out to have been very good ideas. I put them in the same category because they are difficult to distinguish without the benefit of hindsight.
Here’s my point: The best product ideas are often found in the “bad ideas” category!