Jon Peddie Research has published some numbers on Graphics Chip shipment data for the Q3/Q4 of 2008.  Unsurprisingly, there was a drop in Q4 shipments compared to Q3.  The first drop since 2008, but like they mention:

“While the quarterly results for Q4 08 are obviously unusual it is perhaps slightly less surprising considering that Q3 was also a surprise in the other direction ” Jon Peddie commented. “Shipments for Q3 08 were unusually high even for the traditionally high third quarter. In talking to vendors in related industries we have seen the same scenario playing out – a robust third quarter and a much slower fourth quarter.”

So what does this mean for us?  Well, NVidia gained some ground on AMD/ATI in this quarter.  Desktops are still the majority of sales due to things like CrossFire & SLI, but with the new mobile processors coming out that may shift in 2009.

via Computer Graphics Chip Shipments Dive in Q4 ’08.