But they didn't really add tech in FO3. In fact there seems to be less tech. Now we're being told there's a new game engine. Imagine if 20mins before release you find out that iDTech 5 dropped megatexture or CryEngine 3 dropped specular mapping? Demo's are part of the selling points of the game.
falllout had less tech? I do not agree there. Especially in terms of the eye candy side. Check all the new shader code, dismemberment, all kinda of advancements to psystems, new Landscape LOD algorithm. More optimization in the form of a portal/window system. It goes on and on. One thing that was dropped was the mount system. it's basically impossible to parent 1 skeleton to another.
not sure what else was culled though. Probably a few more things. from my perspective, overall it was moving forward in tech.
20mins before release is a bit short on time there! Devs would running around like headless chickens. But yeah I see your point. But basically nothing happens. Except you get a whole load of moaning from gamers lol/ It happens all the time. Spore is prime material. And yeah it is a marketing tool to sell games. As long as the company isn't dangling things in demos they
know will not make the cut, then I'm cool with what ever tech the want to demo.
I watch loads of demos