I tried Lenovo's rotating display laptop, and it's as wild as it is practical

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ZDNET's key takeaways

• Lenovo debuted a new proof of concept laptop with a 14-inch rotating display. 
• It goes from a landscape to portrait orientation by physically rotating the screen. 
• There are some design elements, like the fabric backing, that raise concerns about its longevity.

Earlier this year at CES, we saw Lenovo's wild "rollable" laptop proof of concept -- a computer with a screen that rolls out from under the keyboard to make a 17-inch display. It seemed like a pie-in-the-sky idea, but it was released to market this summer. I recently tried it out and found its vertical display surprisingly useful. In fact, I kind of loved it. 

So when I saw Lenovo's next proof of concept laptop, I suspended my judgment that it would be something to never make it to production. The ...