No, they are not going to have them "anchor" 150 miles offshore. They are going to have them cool their heels 150 miles offshore rather than drifting in the near-shore "drift areas" as they have been. (I was at Catalina three weeks ago and spent some time monitoring VTS on channel 14. Because the anchorages were all full they had a waiting list for a spot at anchor. Those on the list were instructed to drift outside the traffic separation zone, maintaining a distance of 3 miles from any other vessel.)
Moving this nautical lounge to 150 miles out will help with the air quality in the immediate San Pedro/Long Beach areas, and also help avoid other problems, such as the ship that dragged anchor in rough weather and weakened the oil pipeline that eventually leaked.