I thought: I better share some thoughts on Ello before it is too late!
My own view is that people are not going to adopt a new social network unless there are significant benefits to doing so. The last one that I have seen that was successful was Instagram. In the meantime there has been a number that have not taken off, from Google Wave and Google+, to app.net and Yo. I suspect that Ello will join the latter group, rather than Instagram.