Thanks for the great post! My opinon is that Ethereum will be the definite leader for some time, because of its great reputation. However, as you mentioned in your post there are some great alternatives/competitors emerging. This is definitely a very good thing and I cannot wait to see how things turn out.
Just today I was reading more about another three interesting projects, namely Lisk, Qtum, and ICON. I'm really impressed of the ingenuity and ideas of some people out there.