I told myself I wasn't going to speculate too much, that I was just going to listen to what people said but . . . I feel the urge to pontificate.
Think: decanters of endless water. Thirty gallons a round. Forever. One jug would be enough to give around forty gallons of water a day for 100,000 people. For 9,000 gp.
So, what do you get? Cities blossoming in deserts, for starters.
That thirty gallons a round is also at high pressure. Steam engines? Pshaw -- water power! Portable! The size of a bottle! Slap a few of those babies on the back of a boat and, shazam, you've got yourself a vessel independent of tide and wind. Decanters of endless water as <i>free power</i> once you put in the initial 9,000 gp investment! They'd be everywhere and used for everything! Factory owners would buy them for water wheels to propel their factories -- you want to talk about magically jump starting an industrial revolution! Well, I got your industrial revolution in a bottle!
Of course, there might be problems with these widgets. Such as . . . water pollution! What happens to a desert city that has five or six of these gizmos that, for whatever reason, is uninhabited? Millions of gallons of water spewing for thousands of years . . . shazam, a swamp in the middle of a desert!
And, eventually, inevitably, enough of them would start to effect the overall environment. The water would be going in but would they have the foresight to take it out? I mean, more water can't be bad, can it?
Until, of course, the weather starts to change. Would they even notice it? Or suspect the cause? Would water removal become an issue? Who knows!
Thinks like this keep me up at night when I'm sick, which I am.