Big problem CrazzyMan: The Xbox 360 came out in 2005, so the grand total of 7.95 million consoles (which is the 360's total at the end of 2006) is not entirely from that year. The 360 sold closer to 6.6 million in 2006 alone.
Thus far this year, the 360 has sold... almost exactly 6.6 million, and thus has almost exactly matched its total from last year at this point, with 3+ weeks to go. It's certainly not a break away hit -- I'd argue that whatever total the 360 reaches isn't really a spectaculr number compared to a dominant console like the PS2 -- but it's still better than you're saying, and your original premise is wrong; the 360 WILL sell more this year than last.
It's likely the 360 will end the year with 7.5-8 million sold, worldwide, a 15-20 percent increase in sales overall, year over year.
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