Aren't AMD's APU's cheaper though? Also, the new Lano's are more powerful than my old Phenom II 945 which was powerful enough for games.
Indeed, it was better than I thought. It is about in between a core i3 and an i5 which is good enough for anything except battlefield 3 multiplayer, more or less.
Or, well, WoW which for some reasons want unholy single-thread performance.
I haven't looked at the prices, but I think they are.
Unless you tend to run Folding, I doubt its that big of a cost. Remember CPUs and GPUs don't run full tilt most of the time. AMD I beleive uses less energy at low loads still (on their Llanos, not the bulldozers).
The price difference is not all that big, actually.
I searched for the cheapest motherboard + cpu combo with both platforms (the other components are identical, so that should not matter) in a Swedish computer store (note that these prices includes 25% VAT).
AMD: 729 + 680 SEK
Intel: 1005 + 599 SEK (there was actually a motherboard for 500SEK, but that one did not include HDMI)
So the total price difference is around SEK 200, or $33.
Now, as for the power usage:
A8-3850, total system load (from sweclockers, same 4G ram + 600Gb HDD in both systems):
While idle: 68W
Under full load: 276W
core-i3 (integrated GPU), total system load.
While idle: 51W
full load: 107W
So, ok, the power cost is only about half an SEK/day (around SEK 2/kWh including taxes etc).
So if you idle most of the time it takes about a year to even up the scores as far as cost goes.

Once the new ivy bridge CPU:s come out in march or so the power usage difference at least at full load will be larger, the idle power is actually largely ram + hdd + motherboard, not the CPU.