I second the noise point. If you do "GPU-intensive tasks" (i.e., gaming...) and you actually have a laptop with sufficiently powerful graphics card do run them,

I second the noise point. If you do "GPU-intensive tasks" (i.e., gaming...) and you actually have a laptop with sufficiently powerful graphics card do run them, dissipating that power will mean running the tiny fans at full speed, and that's loud. To quietly get rid of that power, you need large-area flow, and that means a desktop. That, and the cost-efficiency of a powerful desktop, is what prevents me from going all-mobile.