For me, it isn't a must have thing. I pretty much have all the past games for stuff like GB and other handheld consoles I would really want. However, I can see how other people would want it.
What people need to understand however is, there's no possible way ALL the games they want can be put onto a virtual service. There's too many legal loopholes or companies who just won't cooperate. Remember Goldeneye 007? Mischief Makers? How about the Dragon Warrior titles? See....the same thing will happen with the HUGE catolog of GB games on a similar 3DS service. The major Nintendo games will get ported...and we'll never see the likes of games like Final Fantasy Legend II, Dragon Warrior Monsters or Donkey Kong Land due to legal battles and companies never wanting to port them.
In the end, its always better to just go and buy the physical games if you want them. Ebay is the real Virtual Console.
Six upcoming games you should look into:
