It could stay above 100k for a week or two....But I doubt it'll sustain 100k+ sales for any significant period of time until:
Grand Theft Auto IV Launches
A Price drop ($50 USD+) occurs
Only under those 2 circumstances will the X360 get some sort of temporary, or for the price-cut, long, sustained sales at or near 100k.
As for the reasons to pick up a X360: they are there, and consumers are buying them in droves. However, the price is still too high for everyone to just buy it like they are the Wii. The standard price point is still $350. Thats still too high. If MS can drop the Arcade to $219 or below, it'll start selling alot quicker. But at $279 for the basic console, you can't always get a ton of sales.
Like I've been saying (even though some attack it): the price point of above $300 for the main console is just too high for most consumers. By the time you get software and everything, the point-of-entry is just too crazy. Look at the Xbox 1: the second it hit $200, sales took off. Same for the PS2.
Back from the dead, I'm afraid.
