Got my attention, also! I am not currently in "need" of another semi-auto, and my 1911's already have thumb safeties, so I probably won't run right out and buy one, but when I do feel the need to get another semi-auto it will go to the top of those I consider.
Heck, one reason I keep the little AMT Backup .380 I found - literally - is because it has both thumb and grip safeties!