According to BGR.com, you might see foldable Samsung smartphone in 2018. I would love it if it’s something like one in the middle from above picture. I can wear it on my wrist. However, I think it will be some time before I can actually buy one.
Samsung isn’t only company developing folding phone. Source say Lenovo, Vivo and Oppo are working on folding phones as well. But, I don’t care about other two on above picture or phone that fold in half. I just don’t see why it would be better than the one I have (Samsung Galaxy Note 5).