Have you abandoned your desktop computer?

From Steve Jobs: "The desktop computer industry is dead. Innovation has virtually ceased. Microsoft dominates with very little innovation. That's over. Apple lost. The desktop market has entered the dark ages, and it's going to be in the dark ages for the next 10 years, or certainly for the rest of this decade."

Mobile devices have grown powerful enough in the last years to replace desktop machines at most tasks. So do you still find value of keeping around, upgrading or buying new desktop machines?

As an aside, have you delved into overclocking or case modding?