I never really understood the purpose of the XPS line anyway. I
IMHO
Software development and Media work that can benefit from normal consumer video acceleration. They are a lot cheaper than the Precision line and for non-cad/AI tasks and generally outpreform them. The XPS cases are more durable than the latitude and they come with better options for processors and video cards.
From a business standpoint, they were the best option if you needed a normal video accelerator.