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Bluestacks is an Android emulator for both PC/Mac. Bluestacks 3, runs Android version 4.4.2 I believe, while Bluestacks N is in beta, runs Android version 7.
According to the information I have found, The Quest HD, as is should run in Bluestacks 3, "4.4..". However, it is known that Bluestacks may not list in the App Store, apps that may not particularly run well in Bluestacks. I presume. This is something I can not confirm nor deny for either Bluestacks 3 nor for Bluestacks N.
The reason I bring this up, is that I do run all of my current Android phone apps on both my cell phone and PC but more so on my PC. So for myself, obviously having the convenience of having all my apps crossover is a major benefit.
So if I am able to confirm that having The Quest HD for Android being able to run under Bluestacks, then I would opt to purchasing it for Android rather than "Steam".
I am tempted to test out this theory that The Quest HD could work on Bluestacks, but would be at a better piece of mind if the devs perhaps had better insight, perhaps answers to this question.