Quote - Do you think this is useful?

For a low poly table, yes, definitely. However there is a balance to be struck between the convenience of a prop that morphs into various shapes and the extra RAM, that is presumably needed to store the deltas. With 12 separate props, loading any individual prop will probably us a lot less RAM, than loading a prop with 12 morphs, and would only use slightly more HDD space. It would depend on the prop, for a reasonably low poly prop it would not matter that much. Saved space in the library palette, and the time needed to load the library are a counter ballencing factors.

I have often wondered about the relationship between altGeom swapping and RAM, and whether this is better than morphs. I suspect that altGeom is not loaded into memory until it is actually dialed in, but once dialed in, I don't know if it is swapped out when the dial changes.

Quote - Got any more ideas for what it should do?

A wall with holes for a door and windows. The morphs would move the door and window holes around. Also a morphing door and window to go in the holes in the wall. If you wanted to get really posh, the door and window could probably have ERC so that they automatically adjusted to the position of the holes in the wall.

Or a morphing table/floor/wall lamp.