“… you won’t be confined to “a tiny black rectangle”. You’ll use all the apps you already use. You don’t have to wait for developers to adapt them. This is not a someday-maybe tech demo of a future paradigm; it’s (mostly) today’s paradigm, transliterated to new display and input technology.“

This is why I think this device will be different than its predecessors. There are practical reasons to buy it … assuming you can use it without getting sick or strained.