FYI: Obi-Wan only said that because he's using that as an advantage whether or not you have sword-fighting abilites and whatnot, they got this all wrong. There is no myth saying that if you have higher ground, it's guranteed you'll win. And making a REAL lightsaber, is dangerous and illegal. Light is made of a photon, but photons move in a single direction. You can't program one to stop 3 feet from it's source, and if you gather a bunch in a small place. Like we do with lasers for instance, the beams of a lightsaber will likely pass right through each other. Then, there's a power required. Well there are lasers that cut through stone and metal, it requires a massive power input. You'll need something like a small nuclear reactor attached to it.
Yay. Not that it matters at all here, but I do think that "it's over!" statement was borne from Obi Wan and Anakin's relationship. Anakin should have known that he couldn't beat OBI WAN if he had the higher ground, whether by experience or fighting style or whatever. But again, not that it matters. Just glad we've got this illicit material to enjoy ;)