Re: Kettles
No joke, just wrong.
It's harder to get 3kW kettles than it used to be, but that's because of market homogonisation (230V AC, 10 amp limit = 2.3 kW). The fact we have 250V AC and 13 amps in this country is an anomaly within the EU.
As pointed out, limiting kettle power would not really achieve much (although may encourage people to put less water in to start with). Limiting lightbulb power, phasing out filament bulbs and limiting vacuum power (they were on a race to the top) all make perfect sense for reducing energy consumption.