I'd have to say I'm fairly relieved to see these. I never got into the Bionicle storyline, and I understand those who were really into it are rightly upset to see it go. However, I did start getting into Bionicle after a few years of avoiding it and love the system, and how it is both a part of Lego, and something separate. It took seeing Brean's crations for the first time at Brickfest 07 to get me to re-evaluate the series as more than just a curiosity.
So when I saw Ben 10, I bought one to see what the parts would be like, and was sorely disappointed in simplicity of most of the pieces. I was worried that the new Hero Factory would be of a similar more simplistic make, but these photos at least show me that playability, and especially the variety of building possibilities will be similar to, and compatible with my current collection, both in function and style.
I would like to see some larger sets, but for now my outlook is fairly positive.
... plus I really want some of those weapon elements.