This would be funny if it weren't so ridiculous.
I guess whoever came up with this plan forgot that many of the crappy restaurants and shops in the great hall also have locations in the sterile area already, in one of the terminals? Yes, I'm sure a lot of those connecting pax don't come out to the main terminal to go to Panda Express...but why would they, when there's one in Terminal A? I guess maybe spending $160 million is worth it to give them the option of going to Taco Bell and Burger King - woo hoo!
I suppose "getting the great hall back" is a noble goal, but frankly, I've flown in/out of DIA hundreds of times, ALL since 2001, and I think it's still a pretty impressive building even with TSA taking up the floor space it does. This sounds like a logistical nightmare and a huge waste of money.