The general-purpose computer. It's a dinosaur on the verge of extinction at the hands of walled-garden app stores on phones and tablets. I never, ever expected that to happen.
Did people really think the arms race of heuristic malware detection in bolt-on security software would be be sustainable? Sandboxing applications and ending the free-for-all over the user’s entire file system were a long time coming. Then spammy software download websites and “Download Now” banner ads bigger than the official download buttons for popular software made it obvious that we needed a trustworthy distribu…
My old Palm TX did the same thing, showing the graffiti area when a text input had focus and otherwise giving applications the use of all but a status bar's worth of glorious 320x480 screen space. Granted that Palm OS did less to help applications really leverage the extra space than iOS does. But most of what I did on that device was reading anyway.
Of course, Graffiti via stylus suffers less from a soft UI than keyboard input via touch, so it's not quite apples to apples. Still, though, as annoying as a soft keyboard so frequently can be, I wouldn't give up half my phone's display for a hard one.