Also, until we get some good energy storage solutions, we are just going to run into the same problems of too much electricity during the middle of the day and not enough in the evening.
It also can depend a lot on height (very important for wind turbines)
The process is not as efficient as batteries (or just burning oil products found in the ground), but you get similar energy densities as the normal hydrocarbons. After all, the chemistry is the same.
I just wish we had functioning carbon tax or carbon emission markets. Then the government could just set the price or volume, and the market could figure out the most cost-efficient energy mix to hit the target.
Shale oil is a very different process than traditional oil wells, and much riskier to water reservoir resources in the region.
As for the extra space for fracking, most states require returning the land back to how it was before after the few month process of fracking is done.
Thing is, in many places it rains, and the waste water doesn't evaporate, it just remains until a government body cleans it up or the pool membrane ruptures and it enters the water table - many smaller operators wind up after extraction, and leave their tailings for the EPA to deal with, and reincorporate and move on to the next parcel. Again, not just fracking - applies to a lot of stuff where waste is produced.
So, while in a perfect world fracking uses little land, in reality, it uses rather a bit - and is being heavily state subsidised both directly and indirectly.
All of that said, a silver lining might be that wellhead sites end up too polluted to be used for anything but solar farms.
There is an easy way to protect from after-effects: the government must mandate that a specific percentage of revenue be set aside in a trust or other impartial entity (government itself doesn't count, because government funds are always open to be tapped for other purposes). This money is at the end either used by the government to fund restoration if the operator goes belly-up, or refunded to the operator.
The problem with solar is that solar does not provide on-demand electricity. Solar and batteries can, but that is much more expensive than using oil.
That same desert could house miles of solar panels and miles of wind farms. But, very few people are pushing that solution to the energy problem, even though it is now price-competitive with fossil fuels to do so in places like Texas, where both wind and sun are plentiful almost year round.