Here is the breakdown for what has happened so far;
360 2006 for Q1+Q2+Q3 (calender quarters so January through September)
| Console | X360 |
Total | 3,476,623 |
America | 2,278,336 |
Japan | 73,151 |
Total Others | 1,125,136 |
Then for last years Q4 period
| Console | Wii | X360 | PS3 |
Total | 3,016,536 | 3,160,602 | 1,233,394 |
America | 1,241,320 | 2,153,591 | 746,653 |
Japan | 973,468 | 127,140 | 472,605 |
Total Others | 801,748 | 879,871 | 14,136 |
And 2007 for Q1+Q2+Q3
| Console | Wii | X360 | PS3 |
Total | 9,104,197 | 3,744,499 | 3,611,779 |
America | 3,828,313 | 2,377,668 | 1,295,510 |
Japan | 2,692,745 | 162,624 | 742,064 |
Total Others | 2,583,139 | 1,204,207 | 1,574,205 |
So in it's first year the 360 sold 3.48M for Q1,2,3...... and 3.16M for Q4
For this year the 360 sold 3.74M for Q1,2,3
However there are many arguments as to why it did better for 2007:Q1,2,3 first it was supply constrained for the early part of 2006, and in Q4 it became massively available so helped it up to 3.16.....This year it has been widely available all the time, so although you would think this years Q1,2,3 being better means Q4 will be, It might not happen.
I expect very similar sales to last year. maybe 3.5 million, with about 200k more in America than last year, 150k more in Eu (seemed to have a bad christmas last year) and 50k more in Japan.