A Blogging Windows post notes that total licenses is one way of measuring success, but providing a positive and productive PC experience is equally crucial. The post explains, “Analyst firms like IDC estimate that more than 90% of businesses are currently in progress with their Windows 7 migrations. And we’ve seen that companies who have deployed Windows 7 save an average of $140 per PC per year – showing a 131 percent return on investment in just more than 12 months.”

Windows XP still ranks as the number one OS globally, but Windows 7 recently surpassed XP in the United States to reign as the leading OS, and it continues to climb in market share. Any predictions for when it will hit the 500 million mark, or when it will pass XP for good to be the number one OS in the world?