I think NAB is a great initiative, because it is an objective test problem that produces a quantified score. That gives us a handle. A measure we can use to ask questions, like what is the effect of changing the inhibition algorithm, or how sensitive are the results to the feed-forward connection density, or what happens if we take dynamic time steps, etc. That is, sensitivity analysis.
Really it’s making a statement about what HTMs should be trying to do, and formulating that precisely. Obviously it’s not the whole story, there is much more that HTM should be able to do eventually, but it is something.
Here is an account of what I’ve found so far:
I hope this is useful, and look forward to discussing it.