Looking forward to the PC demo but my suggestion is that Crytek might have to work just a little bit more on the textures. Lighting and shadows is PERFECT. Looking at window from a building when the light is shining on it actually BLINDS you depending on the settings! That is awesome. But I feel that the console's textures (ex: for the floor) feel low-res and goes flat sometimes. And the plants in Cryengine 3 say that they've been improved. (They actually move to the "wind" in the game now!) but if you get really close to them, they are 2D and running or walking past them don't make the leaves or plants move a bit like in Cryengine 2. Also the SFX are kinda weak IMO. As in volume and some actual SFX like the guns blazing and etc.
I think we're being too light on Crytek about graphics and sounds because if everyone keeps saying stuff about it being awesome, we could end up having the textures and stuff in the demo the same for the final product. It really needs some improvement.
I know it could cause more lag and stuff but I hope most of these are just for the demo/beta and that they could do something about this. Overall, Crytek is doing good.
And good luck to Crytek on fixing everything before March.