I was just checking out the Vgchartz part of the forum and it had a listing of all the various tie ratios. I was surprised but I saw the Xbox 360 listed as number 3 at 9.9 and only one behind the PS2 which had the all time highest at 11.07.
See? http://www.vgchartz.com/hardware_totals.php?type=Tie%20Ratio&sort=Total
Now that got me thinking, the Xbox 360 might be able to sell enough software so that it becomes the console with the highest tie ratio of all time within a year especially as this generation doesn't appear to be ending any time soon.
It also got me thinking about the Arcade games as well. Surely if those are assumed into the total then the Xbox 360 already has the highest tie ratio of all time its just that we don't have the data to back it up/show precisely how many Arcade games have been sold in total. We just know that a lot have been sold.