For each product I've been able to actually touch, there are ten more I've heard about and wanted to see happen, but they just couldn't be made because certain specialty ICs are just not available to small-time hobbyists/makers.
I don't tend to review these boards because I want people to go out and buy them. I review them because I am inspired to try out new ideas and try my hand at new things (circuit designs, PCB design, etc.), and I figure maybe some other people can get inspired to try too.
I try to feature as much open source hardware as possible, because it actually is possible for people to get custom PCBs and put together their own versions of them.
Personally I love the posts of Jeff as I think they are very well written and well researched.
I love seeing the Jeff Geerling posts and his blog is great!