I don't know if it's even possible to answer such questions concretely. Everything hinges on transaction fees, and future fees depend on both the rate of transactions (which they propose to increase greatly) and the block size (which is being hotly debated right now). The case where their chip doesn't even mine enough satoshis to pay its own transaction fees isn't out of the question.
I'd like to see this answered in some forum. It's very hard to get a more concrete sense of the vision without it being answered.