My complaint with the trailer is that it doesn't show anything new. Based on what was shown, the new movie has the same story as the first spidey movie, minus a villain.
i do think it looks better than the original, but only in a "remastered, now with kung fu grip!" type way. like when they re-released the donner superman film on blu-ray, or something. it's oddly and unnecessarily similar - even garfield's voice is all not-black, like tobey's.
this could have easily been spider-man 4, without skipping a beat. throw in a quick "here's whatcha missed: spider bites peter, peter strong" recap, and bam - new film!