With the vacuum cleaner now such a generic household object, manufacturers need to identify a new niche for their latest contribution towards the endless pursuit of domestic cleanliness.
These days we have vacuum cleaners with air purifiers, vacuum cleaners with special 'anti-hair-wrap technology' (Shark, we're looking at you), ones with uniquely powerful proprietary motors and suction styles, others with whisper-quiet operation.
In recent years, cordless vacuum cleaners have become quite the thing. It's a logical, welcome progression. No more snagging the machine's power cord on the door frame and sofa legs, or tripping unsuspecting home companions. No need to estimate the best choice of wall socket for optimum reach and coverage, when you almost always have to unplug and replug elsewhere anyway to do a full vacuuming job. With a battery-powered, cordless model, you're free to vacuum anywhere. Keeping every corner of the house clean? Sorted...