Yes - I'd say many of these gaming companies are in big trouble. LV Sands bankruptcy seems likely. The CEO, Sheldon Adelson, was worth over $30 Billion last year when the stock was $140/share. Now, at $6, he has lost 95% of that. That has to be the biggest one year loss of personal wealth in the history of the world.
I'm seeing hotel room deals now that I haven't seen in 10 years. And it's only going to get worse for Las Vegas. There are currently over 30,000 additional rooms under construction that will be completed over the next few years - pushing hotel and timeshare rental rates down even further.
Vegas is indeed vastly overbuilt.
There is a detailed list of projects available at this site:
http://www.vegastodayandtomorrow.com/inventory.htm