I think the movie would have benefited a lot from leaving out the cameos. Either that, or I think I would have been better off not knowing anything about video games. The movie was filled with gimmicks and characters that were just drive-by product placements, much like the brand-name foods that kept cropping up, and I found it distracting. It kept pulling me out of the story. If Disney had dreamt up their own arcade filled entirely with games of their own creation, I think the movie would have felt less disjointed to me and instead felt more purposeful, creative, and clever.
That said, I can't deny the movie had its moments. Some Sugar Rush segments were captivating, I thought (probably because at those moments the film was freed up to use its own imagination). Q*bert seriously pulled on my heartstrings, and I also enjoyed Felix as a character and concept. But Ralph and Vanellope I couldn't get attached to -- and not for want of trying.
And here's a serious question (spoiler alert):