I read something scary recently about the Wii U updating in the background without asking which could prove bad and brick the Wii U among other nasty things once we have substantial soft mods. I won't go into detail here about what is wrong about doing what the site claims it does so read for your selves. I am not sure when or if Nintendo will keep using this feature of the Wii U aside from the day one update that used it I can see it being used to counter exploits and we need to find a way to disable it even if it means installing the safe updates like we did using Wads on the Wii.
Read about it here http://wiiuhacks.com/wii-us-dirty-li...ut-permission/
Aside from this rather scary bit of news, updating is going to be very much a requirement in the near future for the Wii U if you want to take advantage of any new features or optimizations to the system, I don't even want to know what kind of issues dynamic updates to games are going to possibly cause for users playing game backups of Wii U games in the future when Homebrew rises to the glory of the Wii.