NEW YORK (TheStreet) -- "Kodak Goes Bankrupt and Instagram is worth a Billion Dollars. 2012, y'all"That was a tweet from @benhjacobs that I retweeted Monday and immediately got hundreds of retweets from my followers. For some reason, it seemed to capture the sense of awe from many over the significant milestone. But it also gets at something else that's amazing in this story. How a small little photo application can be worth so much more -- in such a short time -- compared to an American icon. It says just how important "mobile" is in the business world today.