This is not exactly true. From day one, traditional landbased (e.g., Vegas, Atlantic City) casinos have been anxious to have the opportunity to see their properties in an online form. Even the few that have tested the waters unsucessfully (MGM, Hard Rock, etc.) are ready to go, once the U.S. gives the go-ahead.
On the flipside, Indian gaming is not pro-online gaming. These casinos are the ones who will feel the impact should the US regulate. The good news here is that Harrah’s (now the largest landbased operator in the world) is operating many Indian casinos–and are also the greatest hope for US online regulation. While Harrah’s failed with their UK bingo site, they still very much have their Interactive Gaming division fully-functioning, in preparation of any possible change of heart by the U.S.