"... visibly worried about its safety"

Bikes have a slight learning curve as well, but they're still available. Even walking isn't that easy the first time.

the thing is _tiny_ compared to the Segway. It is basically designed to take up no more space than the person standing on it would. I assume that's the reason why it may not feel as stable intially.
The "S" and "M" versions seem to be designed to not even have a handle to grip onto - you just have a little lever-like structure that keeps contact to the inside of your legs below the knee. Only the "L" version has a handle. According to the photos, you could probably fit four to six of these into the trunk of a car - again, definitely far from a Segway copy. Rather, somewhere between a Segway and a Kickboard.

No, 'segue' is a word.

I don't know what they are driving at. It sounds more like a prototype than a real usable thing. The 3mph certainly suggests it's for the elderly but then, older folks would probably want to sit down. That's a bit difficult on the winglet.

segway is a word too

Thus showing that the Japanese are good copy monkeys but not very imaginative. Slower, less mileage between charges and not as safe....But just wait a while and they will do with it just what they did with automobiles...

Still don't see these being allowed on sidewalks with pedestrians, though... 

Someone at Toyota must have too much free time on their hands.

Awful name for it, winglet is an already existing word.

The missing pictures of it: 
http://www.akihabaranews.com/en/news-16486-Toyota+announced+the+development+of+its+Winglet%2C+a+personal+transport+assistant.html