Report: Xbox One and PS4 use up to three times more power than Xbox 360 and PS3

[SvennoJ]

Actual results from that link

The PS3 went down from 209 watts while playing a game to 70 watts during the last gen
Xbox 360 went down from 198 watts to 80 watts while playing

So PS4 and XBox One have a good start, apart from the standby consumption