Anything done well and done right can work...
We all can appreciate the work that hundreds of artists do, but it all comes down to directors, direction, and directing. Polar Express at least has the excuse of trying to look like the art from the book... but the hyper realism, motion capture or not, doesn't really flatter the character designs. And that of course, if the fault of the main director who CHOSE to have it look like that. The artists work hard and long hours... it's a valiant effort... but when it's all over, the main direction doesn't work even after all that effort. I totally agree it's more gimmicky than anything, and you can tell Zermeckis only likes it because it's shiny new technology... all these fuddy duddy directors inevitably rely on new technologies instead of working harder on their projects. They let the shiny flashy stuff speak FOR them, and often times it just illuminates a shoddy project. Need I say George Lucas? Third Star Wars was good, anyway...
Now, this is a VERY primitive TV limited animation example of what COULD be done with motion capture...
From Donkey Kong Country the animated series ... This is well over 13 years old and not perfect, but it uses the motion of actors and BUILDS up on it to create cartoony figure. This was only explored in Monster House, and it REALLY should have been used here.
In the end, it's not given the true potential it SHOULD have. It seems to me more like they're exploring ways to show how human actors are becoming obsolete more than exploring the artistic merits. It doesn't have an organic feel, both artistically and thematically. I'm sure they kept most of the artists on a tight leash about what THEY wanted out of their staff, and that does hamper the artistic vision of all of those who worked on it.
I hope that a new company regroups the lost artists here and does something really swell.