While I really like all the properties of this wonder substance, I'd be more cautious about the possible negative effects. With plastics we have a big problem with pollution (Big Pacific Garbage Patch comes to mind), and toxicity (BPA, etc).

What will be the problems with graphene?

Don't get me wrong, I want all the positive things it is promising, but I am worrisome that we are going to head-rush into it like it happened with pesticides, plastics, and others.

Who controls the patents?