@Francisco
Im not here to discuss this to death and I agree with most what you say, so Ill keep it brief.
From the software I have seen, browser VR is "a shortcut" to getting your tour on multiple devices (having cross-platform integration at the cost of loading times and quality). Im sorry, to this day I have not seen a browser VR experience that loads as fast and has as crisp of an FPS, as my theViewer apps. When going to a client, I want to be 100% certain my tour will load, it will behave as it should and my client will see top image quality. I dont have the courage to rely on the internet connection at their office, or have them make comments that its laggy or rooms load too slow. Thats my line in the sand, but of course, I accept the opposite view.
@Josef
If you know Corona-renderer, they are actually launching their Corona VR Warp Helper, I think its called, with theConstruct, so you can place scenes where the panos will be, put warps/hotspots in and then render the whole tour with warp coordinates already in the .jpg output, so its ready to go online or in an app.
I havent tried it myself, but Corona seems pretty proud of that one, my bet is that other rendering software will be soon to follow