by Marcus Green.
I don't see it as a threat, more as a potential inspiration for user interface concepts. It would make sense for developers to login/install copies of canvas and see how they do it (which I have not done yet myself)
In my day job I use one of the leading commercial VLE's and although it would not be my choice of tool, there are features that make me think "I wish Moodle did it like that". My main piece of moodle coding my gapfill cloze question was inspired by the ease of use of question creation in that tool as opposed to the complexity of the syntax for the native Moodle cloze question type.