Not really.
Trump will just pour in money and people in the end. Polls for Iowa are not polling for a primary, and most people are not going to be in a caucus. So they are pretty useless for much of anything.
Carson is just the “generic candidate” safe choice like Scott Walker was for the people that aren’t ok with supporting Trump.
Neither are going after each other, so they will stay cool.
I think you will see Walker rise and Carson deflate as folks fess up.