It's nice to see some people that know quite a bit on this. Some people like to take the "who cares, it's not my money" and "let the team handle the cap" approach but for some of us this is fun to look at because knowing the cap well can help you see the road the team is trying to follow and gives you an idea of what they may do going forward.
We're not in as good of shape as most casual fans believe. As others have said, if not for the rolled over money we'd actually be over the cap this year. To add to that, The rolled over money is different than actual "cap space". The rolled over money is gone once it is spent this year, unlike cap money that is there every year (reoccurring money)