what causes thermite to burn involves the aluminum drawing the oxygen out of the iron oxide, and igniting it. its a big chemical thing, but suffice it to say, thermite is completely inert until lit. i dont see how it could be use as batteries. and norgus, i did see the trademark, but i found it funnier to ignore it.
looking at the design... i wouldnt like to have both my eyes covered by that screen thing. if done on actual terrian, if the sensors missed something like a slight dip or a rock, root, etc, it could be dangerous. and if simuated terrainm used on a flat surface, well... you try walking up a hill that isnt there. so the only option i could safely see would be simulated flat terrain on flat terrain, and most battlefields, even uraban envionments, arent consistently flat.