GBC had an entire library of games that could only run on it so he's right in that sense as the platform was significantly more capable than the normal GB more so than the N3DS to the normal 3DS.
Then I stand corrected on that front. I thought that GBC games would work on a regular GB, just without the color. I fact checked it and it is true that a regular GB cannot play GBC games, or at least most of them as there were a few that were designed to work on both.
On that note however, it does show that Nintendo has already done an upgrade similar to what I am predicting...or one cycle anyway. Kind of makes me feel even stronger about my prediction.
Though this was a long time ago and their actions then cannot for sure translate to how they would handle things now, so at this point only time will tell.