Number 2 - Portable Desk

http://www.hongkiat.com/blog/useless-japanese-inventions/

For those busy Japanese, they can take their work on the go!

But the might accidentally run into things while they are walking with this.

I think they should take time and breathe when they are walking instead of working all the time. It's unhealthy.

I find this "useless" because their attention is split into 2 things: walking/ dodging things and working.

So the user will give only half of his or her attention to each activity.

So there is a greater chance of getting hurt and the work quality won't be as good.

I say stick to work in the office and walk and relax while walking.