I think that supporting Photoshop plugins, the old .8bf style ones as non-destructive Live FX would be great. Internally it would convert the object to bitmap and apply the plugin then keep a cache of the result to show for the object. Then changing the settings of the applied filters is allowed. Same way that Fireworks handles .8bf plugins non-destructively on vector objects. I use lots of the KPT and Alienware plugins on vector shapes in Fireworks mixed with dropshadows and glows and transparent texture fills etc is really cool.