First to ditch legacy keyboard/mouse ports in favour of USB.
First to ditch parallel and serial ports.
They've ditched processor architectures, not once, but twice.
Now they're the first to ditch ethernet.
Once I got over a burst of Jobs fanboyism, it makes perfect sense. The only reason I use ethernet any more is because large file copies are faster - but with N, that's not relevant any more. My N800 and iPhone both have no ethernet ports.
Looking at the specs, it looks like it's not going to be most peoples primary machine - but as a portable terminal to view the content on your network, it looks gorgeous.