Redau, after thinking about it I think the problem is one of scale.
The poker people have to keep track of perhaps 100 transactions (games) per night per player on their books. The TPM would have to keep track of hundreds of thousands of transactions, and Wave would have to communicate with and keep track of millions of TPM's. As to billing, what should the price be for each of those transactions. If the price is set too high some businesses would be priced out of the market, while if it is too low the price to some low usage private parties might be less than a penny or at least so lows as to not be worth the cost of the billing transaction.
As Ramsey pointed out Wave would more likely base its income on the virus protection companies business model of selling software and upgrades rather than attempt to meter usage by internet transaction.
After saying all that I have just thought of an alternative billing scheme which would only require accumulating the number of accesses of the encryption keys stored in the TPM which would tremendously reduce the accounting problem. It just might work and justify the cost of encryption security.
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