One of the things I think the magazines do better than the internet does is identify new product. I enjoy seeing builds done with product that I didn't know existed, like the new Fox Lake E-Street CNC heads. Several months back, MM&FF did a 347 with those, and it was long before I saw anybody on the internet do anything more than just talk about them. In fact, I think I have yet to see anyone on the internet build any engine with those heads, and they seem like a really good quality set of heads.
The mags have a direct line with the manufacturers, and so they are usually on top of that stuff, which I enjoy.