Neat observations. I wonder how one can become more effective at understanding which features customers won't want. I guess focus groups are one answer, but the danger with these is that your product's desirability may be limited to a local maximum. Further, it seems that the most desirable, iconic products rarely come from focus groups.
Yes that is what I took away. I think the article was highlighting the get it out and often mentality. Like a build early and often type of iterative approach rather than work on things you think the customer might want without some experimentation with the product/market insight.