He said he predicted failure for their SECOND tablet. Which was the iPad.
Yes, this is what I meant, and I was far from the only one saying so. Those who weren't Apple fanbois mostly predicted the iPad to be nothing more than an oversized iPod Touch filling a small niche that could only cannibalize from Apple's existing portfolio.
10" touchscreen tablets were totally unheard of, the Newton was a flop, and everyone hated laptops with touchscreens. A tablet, keyboardless computer had, in the history of mankind, never been successful. Plus the iPad was _expensive_. People would buy the cheaper Kindle or netbooks (remember those?) instead. The concept of carrying around a tablet instead of a laptop was ludicrous, because the apps that would enable you to do that did not yet exist. Four years later it's easy to look back and say "well, duh", but in 2010 it was seen as a risky move for Apple.
My point is that it's easy to be wrong about what people will buy, and it's too early to know what will happen with wearable computing. The right product at the right time could change everything.