As Lady C explained on another post today, it's hard to see dead parts of some plants once they've bloomed. I'd go a bit further and suggest it's hard to see some parts well enough to prune well. Grass is especially difficult sometimes.

So I'd love the ability to Rotate plants, so we can see at least the back side, if not every 90 degrees. This would be especially handy while in the nursery, so we can trim on the spot, while the customers are still milling about, or at least understand why they're not buying and drop the price accordingly.