For me there are a couple factors that make a good reboot...or Modernization as it were.
But I feel the most important is Consistency to the Core Elements, This is one that time after time, writers/Directors/Designers tend to forget,
and also the reason why DC can go through multiple reboots through the years while still maintaining it's fan base.
For instance, In the recreation of Psycho, They didn't take into account that the "lack of color" was actually an important core element
to the Franchise. They didn't realize, or perhaps just didn't care, that Hitchcock CHOSE to create the film in Black and White,
when color had readily been available at the time. When you add the color, It no longer feels like Hitchcock....It's just no longer "Psycho"
Now back to the original topic, Would I support a Toy Story visual remake? It depends.
If they just gave it the exact same character design as Toy Story 3, Then I'd be all for it.
But I don't believe they would, they'd change something. They might give buzz a more chiselled appearance or
They might subtly change the hue of Woody's Hat, Whatever it is,
It would seem unnecessary to them but It would change how most would enjoy the movie.
(Wow I ranted for quite awhile... o_o)