At that point you're left with an underpowered desktop experience. It obviously depends on what work you're doing, but I'm happy with my desktop machine with 12 cores and 24 gigabytes of memory and wouldn't switch to a laptop for anything in the world. I have my personal MacBook Pro I can use when working from home or when travelling but it's definitely a second-class experience. The downside is that a high-end dual-processor Xeon and a compatible motherboard costs a big chunk of Fog Creek's whole per-programmer equipment budget. If you're working on web apps, it probably wouldn't be worth it.
