Solar Rigs

So I was reading this the other day and it got me to thinking: Who cares about the submarine, why don't we have just the "solar islands"? Imagine if we had huge solar islands (submersible even, so when the storms came they could just disappear for a while) in the same way that we have oil rigs. Or even solar islands that have wave/tidal generators on the underside. The downside of most alternative energy sources like wind and solar is that the equipment tends to exist in out of the way places where it's hard to get the produced energy to the grid. Obviously solar islands will suffer from the same hardship. It's just odd to me that we'd go through the effort of extracting oil from beneath the ocean floor, overcoming all kinds of challenges, yet solar islands (or farms) still are not widespread due to the overland distance thing.