Both humans and automated vacuum cleaners (e.g. Roombas) find it inconvenient to operate a vacuum cleaner around furniture—specifically, no one wants to move extremely heavy furniture just to vacuum around the legs.
Most furniture is still stable even when not all supporting legs are contacting the ground. So why not have telescoping table legs that can retract to allow a vacuum cleaner to vacuum under them?
This would allow a robotic vacuum cleaner to achieve 100% vacuuming efficiency in your house, rather than having it be limited by its inability to drag your heavy furniture around.
If you work at a robotic vacuum cleaner company, you should license this patent from me immediately. Also please file for it on my behalf (thanks in advance).
PROS: Allows 100% vacuum cleaner coverage to finally be achieved. FINALLY.
CONS: With no goals and struggles remaining after this, perhaps existence will seem hollow and unsatisfying.