Not quite Benny - you don't normally use a vacuum cleaner every day - and if you do, would 5 minutes suffice compared to the 20 or 30 times a kettle is used daily? Same with a hob, it uses far more electricity from the moment it is heated up, switched on and used. We can discuss how long a vacuum cleaner can be used compared to a hob, a tumble dryer, a washing machine - but then I think we'd be here until doomsday. There's only a select few who choose to vacuum each day compared to those who are tea and coffee mad and need a brew every couple of hours, or new parents who require the washing machine and tumble dryer to be used daily. Lets not also forget the daily appliance that also uses up energy - the fridge/freezer.
Thus, there really isn't much of a justification to lower vacuum cleaner watts - unless the EU are trying to get around brands to lower everything else they produce.
Also JM - kettles with higher elements don't produce hotter water, they just do it faster due the higher power element - if it was the case that rapid boil kettles produced hotter temperatures, brands would have to cease selling the product as boiling water suitable for domestic use has to be at a fixed temperature.