I replaced a 500 Watt P 4 monster with a pi.
15 watts vs 500 watts was a 35 dollar a month savings on my power bill.
Seriously. My bill is fairly static, and the pi running as my dlna server, squid box, 4tb samba box and my home theater PC, as well as my desktop.
Just switched a kid to the pi. Loses a monitor and a 360 Watt desktop.
For a 15 Watt USB device.
Yes, please!
--Shane
KD6VXI