The first thing that comes to my mind is that HTM is supposed to be “like a brain”. To me, online learning is neither especially interesting nor unique feature of a brain. I’m more interested in how brain forms long term memories, how it accesses (and quickly modifies) them, and how it organizes higher level concepts. How does it build a “world model” or acquire a “common sense”? These are important intelligence features, which current ML methods can’t model or even mimic, and I think that HTM can actually get there first.