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Oooh this sounds so good I'll have two!
I thought that he missed out a lot by focusing on the elderly and infirm as a market. I think he should have tried to market it as a solution to H&S concerns over changing bulbs in small businesses, church halls and the like. After all we all know the potential hassle that ladders involve in that sort of enviroment.
That said it does sound like they would avert a minor hazard (people climbing on chairs etc to change bulbs) with a slightly higher hazard (buildings burning down left, right and centre, leading to higher CO2 emissions and the crash of civilisation as we know it due to increased global warming).
Cheers
Mark