Imagine a "lab in the toilet". Every time it is flushed, it runs analysis on the current contents and produces reports if requested, or alerts if needed.
"You're currently suffering potassium deficiencies, which can cause frequent headaches. Eat a banana to alleviate concerns."
And that was version 2. http://edition.cnn.com/2005/TECH/06/28/spark.toilet/index.ht... Shows you could buy one in 2005. From that description, it seems there was some room for making the thing easier to use then, though.
As long as the stupid thing still flushes without internet access; I have never been more concerned about an IoT version of an existing appliance not doing its job. That is, I could stand an oven or blender not functioning; a toilet simply must work or the bathroom itself becomes nigh useless. "Honey, our toilet won't flush; are we still being DDoSed?"