Golf Gadget Idea?

I was recently at the Canadian Open outside of Toronto in beautiful Oakville and one of my many observations of Tour players while marshaling the 12th hole was that alot used some sort of aid while practicing on the driving range especially as well on the putting green. Golf is one of those gadget sports where you see alot of helpful aids out there for your swing whether it's too do with alignment, swing plane or whatever it seems like someone invented a gadget to help out the golf obsessed. So maybe my idea of ellipticals specifically for golf might make a go of it. At least it would be better than regular work.