The GB Micro was an unsung hero. It came out too late in the GBA's lifetime, and too early in the DS lifetime to really do anything other than be a last cash grab, but weirdly people are going nuts for it now
I agree, the GB Micro could have been an interesting handheld, if it weren't for the Nintendo DS being released shortly after. Also, being the Nintendo fan that I am, I tried to add a GB Micro to my collection of handhelds, but they were waaaay too expensive, especially on eBay when I last checked.
That was quite the nice video. It was really cool to see how Nintendo has improved on the DS over the years. It was also cool to see what previous generations had before the DS.