The one concept that I hadn't really pondered much before is that of Planned Obsolescence. This is where a product designer makes a product such that you will want to discard/replace it after a specified amount of time. Things really aren't built the way they used to be, and there's a lot of scheming behind that. An aside to that is Percieved Obsolescence, where fashion trends dictate that your old stuff looks embarassingly out of date, even if it works fine. Anyways, interesting video.