Jeremy A. Kaplan and Sascha Segan:

The most innovative tech doesn’t always succeed. Here we present 10 great technologies each from Apple and Microsoft that were simply too far ahead of their time.
Mention technology that failed and people instantly think of Microsoft Bob, the IBM PCjr, and worse. But those weren’t necessarily great products—heck, Bob wasn’t a good idea at all. The ideas and innovations that succeed aren’t necessarily the best either; they just happened to be in the right place at the right time.