Does Shale gas boom mean the end to renewables?

I know this won't do much justice to the complexities around power generation via regulated/non-regulated and merchant/contracted assets but I'll try and give you a simple explanation. Given, near-inelastic demand of electricity, supply is set by assets that are able to generate power at the lowest cost (focus on variable costs that increases with more operations). that being said, renewables have very low variable costs even compared to natural gas fired combined cycle assets. so in sum, renewables are almost always providing energy at a baseload compared to assets with higher costs.

But don't forget that peakers also make a lot of money serving power whenever demand peaks beyond typical baseload for a significantly higher price. So the story is very complicated and I would suggest that you go read up on the power market to answer your question. Hope this helps.