I also can check on my mirrors with even more frequency and entertain conversation with people in all three rows, sometimes even with eye contact. (I also watching tv while I'm typing this too. Actually I leave the tv on when I'm doing other stuff just because.)
But back on topic, interesting stuff. I would be interested in a separate GPU just to play HD content and maybe visualization stuff. Also some front ends do benefit from extra processing power.
But given your needs, I don't think it's a must. If the FE you choose depends on flash a lot, I would chose as much cpu power as you can get. Also recording from webcam requires CPU, and if you do that while routing, and displaying fancy graphics, that can tax your cpu.