1) There are some specific applications where you may be able to use more than 32GB of RAM. If you have a database thats, lets say 50GB, and you have 64GB of RAM, you can keep the entire db in memory, greatly increasing its speed. Its possible that some content creation may use up to and more than that, but that would be production on a commercial level -- think Pixar.
2) Other than that, I dont see too many applications of it. Even if you run a lot of VM's, and give each one 2 GB, you can still run 15 VM's ( 2GB to host OS) which is quite a few.
3) tl:dr -- for a home user, there is pretty much no benefit. As of now, even 16GB is quite a bit, although Im pretty sure I can find a use for that much.
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EDIT -- oh, forgot the most important. A bigger e-penis.
1) I was talking about for people not corporations however I failed to make that clear so thanks
2) what's the point of a Virtual Machine?
3) Yep, just like those people who want a tank to... "compensate"