Well, first of all, as everybody here probably knows, both solar and wind energy aren't clean. (And depending on location, also not profitable). In order to make things worse, the most high tech variants rely on so called rare Earth's , on which there's currently a supply crisis*. In fact, several green plans for complete conversion to green power by 2030-40 would fail because of this, as there simply isn't enough material being produced**
If we also add the other costs, like transportation and such, I'm pretty sure that over the lifetime of the plant Nuclear power*** comes out better than wind, which is then way better than solar.
And, Nuclear power has the advantage of being really stable and predictable, whereas all green power needs large, often expensive and polluting battery installations. And, in case there is a supply shortage, blackouts would be much worse. (Power shortage causes ampere to drop IIRC. Now generators can be damaged because of that, so they shut down automatically. The smaller the power generation unit, the easier it's damaged and the smaller the margin. It's also rather hard to restart all green power generators at the same time)/
The main advantage of nuclear lies there, in that it doesn't require significant changes and investements in infrastruce, whereas renewable requires significant investements to be made.
Oh, and about the geothermal thing. A core tap kindaish is exists, in Iceland. There's a giant mantelplume there, allowing large amounts of geothermal to be produced and exported.
*Which is not expected to improve for the first 15 years.
**Sure, alternatives exist, but these are expensive.
***We're talking about High tech 3th-4th generation plants though.
Here's a federal grant for homeowners (has been extended to 2016). I think there's also several grants to solar panels business. Plus some states grants. And most developed countries also grant electricity companies to buy solar electricity as an higher price than the real one.
The subsidies for oil and gas are multiple times that of renewables in the US. But here's the thing: once renewables get good enough that support isn't needed, they'll stay that way. Fossil fuels are only ever going to need more propping up.
I'm thinking more along the way of nuclear taking over fuels (as much as possible seeing technical issues). But yes, coal and oil should (hopefully) decreases. Which is why it's really dumb to close a nuclear plant to open 2 coal ones.
Unfortunately, due to fuel/ energy prices. It's unlikely you can replace nuclear by anything else but coal without driving up the price. Coal is the only other resource cheap enough.