###The current policy by community consensus is:
Allow appropriate tablet questions, but not actively encourage iOS and Android. Basically they will be treated like Ubuntu and OS X are treated right now.

I found out today that Tablet questions on Super User are closed as off-topic.

Related question: Will iPad be acceptable subject matter for Super User? I guess not?

There is no rational logic for this, since Tablet PCs are just a different form factor of computer, like laptops used to be. There needs to be a discussion on this.