Those 4 features all my mobile devices have. Even my old S40 phone had that. It only would crash 1 time a month, and taking out and in the battery would reboot the thing then. For the rest, it Just Worked. Ofcourse, it did not do much.

So, hardware is different too. Zaurus also had different hardware. Yes, compared to default ROM for Zaurus Maemo is indeed amazing but the general public compares Maemo to:

* S60
* Windows Mobile
* iPhoneOS
* Android

Or rather, they compare an end product (with hardware and software) to another product. And, usually they compare the out of the box experiences with each other. So the out of the box experience and default settings are very, very important.

What you will see is for example G1 or G2 compared to Nokia N900. Or the new iPhone compared to Palm Pre. What OS they run is not even mentioned in name. The general public will not care the device runs Linux or not either, because it Just Works. A minority cares, and that minority wants to be able to modify the thing under the hood. Some kind of legal Cydia community.