My favorite sources of information about e-bikes come from endless-sphere.com, electricbike.com, electricbike-blog.com, and the /r/ebikes subreddit. Also I've obsessively watched almost every video with "BBSHD" in the title on YouTube in the last several weeks. I will say that the technology is moving pretty quickly and the state of the art today will be the underpowered overweight crap of tomorrow. There is a LOT of room for better technology and the price can come down further as well, all it'll take is an expanding market and competition to bring new innovations to market.