Yes, it is a good day for the U.S. Many (maybe most) people both here and abroad had doubts that America would ever elect a black person. Sure, it was always theoretically possible but there also that simmering doubt about whether enough white people would really pull the lever. It may not have happened without the incredible damage done by Bush/economy/failed wars, but it did happen.
And it is perfectly natural that the media is spending a lot of time documenting this day but the stock market is falling again and Russia is rattling sabers so it only took a day for a set of reminders that the world is still a dangerous place in a dangerous time. Good luck to you, Mr. President.