The road ahead is from 1995 and is about the Internet ("Information Superhighway") which Microsoft almost missed, but got right just in time.
The Smartphone he saw coming earlier than almost anyone else, and Microsoft desperately tried to conquer that market. They initially failed because existing mobile phone companies (Nokia, Motorola, Ericsson) feared Microsoft too much and refused to partner. Then Microsoft had to enter the market with third tier player HTC, which had no distribution at all. Then they executed very poorly, trying to miniaturize Windows using a pen interface and killing the much better specialized numerical ui they had. Then they got surprised by the iPhone and touch screens, and took way too long to come up with a good implementation of that, with Windows Phone 7. And then finally with Windows 8, they redid everything again for no good reason, loosing any loyalty from customers they had left.
They missed smartphones, but not because Bill Gates did not foresee them.