Flash is ubiquitous. Ari Jaaksi said once that the experience of surfing the web on the Internet Tablet had to be the equal of surfing on a full-size computer. Without Flash, you don't have it. Note that I haven't brought Java into this. That's a significant hole in the NIT's capabilities, with web-surfing effects. But I don't think Java rises to the level of walkaround-web necessity.
- Always on. The 770's cover not only turned off the display and protected the screen, it also broke the WiFi connection. "Instant on" seemed good enough at the time, but today we realize the net needs to be able to reach out and signal us.