I think it´s a PR gag. If you don´t have the water for your meal, maybe you should think twice about eating it in the first place. The option to filter water may be an definite advantage though.
If you´re still hungry after seeing that the meal was made with urine is a different subject.
When people install plant to make potable water out of a muddy liquid you´d not even use to have a bath, they usually drink a glass of the purified water in public to demonstrate that the produkt is fine. I guess we have to wait a bit before we can see sales people to do the same with their product. I admit that I´m not particularly keen to see it anyway.