Errmmm...
Laptops ARE desktop replacements just like tablets are becoming laptop replacements
It is 2011!
Well, I'll wait for 2012 Ivy Bridge. The 3 big bottlenecks as CPU, RAM and hard drive. SSD's and plenty of Ram can make a huge difference. I think Ivy Bridge will be able to handle 16GB of RAM and may possibly have mobile quad cores that do't get super hot. I am really happy with my Arrandale over the C2D and 8GB ram made a huge difference in performance for photo editing software like Photoshop CS5 and other software I use.
If you want or need more power, then the next refresh, late 2011 or early 2012 might be worth it as that will likely also have Light Peak....
The next thing is always better the current thing is pretty good and about to get even better.