Not really, no.
I'm building a PC with two consoles, a CPU that can push 2 MPEG-4 streams (2 VGA outputs), a DVD/CDR drive (2.5''), a hard drive, two audio cards, WiFi, GPS, GPRS modem and TV Tuner. I use a non-mobile Athlon XP 1700+ CPU and a desktop motherboard.
The net power consumption of all the above orchestra falls short of the 60W mark. This figure doesn't include the two screens for the two consoles.
You could probbably pull around 1000 Watts off your battery if you so liked.