Not the businesses that use Bitcoins for transactions. Just the exchanges, brokers, and dealers. The ones that handle other people's money. Over half the Bitcoin exchanges have failed, taking customer funds with them.
And every single miner who exchanges mined Bitcoins for fiat currency. The guidance doesn't even provide a carve out if the miners uses a registered exchange.
This hearing probably is a lose for the shadier exchanges. With all the major US regulators indicating that they have no fundamental problem with Bitcoin, attention will be focused on the bad actors. Like Mt. Gox not paying out customer funds.
The status quo is a lose for 100% of Bitcoin exchanges, not the "shadiest".... 100% as in every Bitcoin exchange in operation and every one that every existed. There isn't a single Bitcoin exchange, broker, or deal with a MT license in all fifty states. The closest anyone came was Bitstamp and when they got all their licenses (at tremendous expense), every bank shut off their bank accounts and refused to do business with them.