All I want from an airliner toilet:
1. Clean, flushed.
2. Seat that doesn't fall when peeing.
3. Doesn't make that normal but fu***ng terrifying WOOOOOOOSH noise when flushed.
And, I suppose, no handguns, box cutters or bomb notices in the sink. Maybe a guy handing me towels and aftershave.
How many technical innovations can one make when it comes to crappers anyhow?