There's a vast gulf between the dreamy notion of glasses-free 3D � extra visual depth without any clunky eye-wear! � and the reality: fuzzy imagery, buggy execution, and headaches. Oh, the headaches. So it goes with Acer's Predator Helios 300 SpatialLabs Edition, equipped with the company's glasses-free 3D screen. It's meant to unlock an entirely new dimension of gameplay in titles like God of War