$30 per megawatt-hour is 3¢ per kilowatt-hour. That's less than I'm paying and is getting in the range where widespread roof mounting of solar panels will at least aid in powering air conditioning during the day even without storage. If I were building a new house I would probably design it with solar built in, either on the roof or in the yard.
The price is finally getting to where it should be taken seriously. Especially if it allows people to get off the grid so their power can't be cut off by outside forces.
Just FYI, look into a “ bloom box” a hydrogen fuel cell using natural gas and water. Very interesting. Google has a small plant powering some of its campus.