Recently in a lobste.rs discussion thread, I wondered how people would react to programmers using PDF as an application platform: use a scripting language to update the content of the PDF file on the fly and in response to user events. I'm quite certain that most, if not all, users would shun these applications as they would be slow, unresponsive and ultimately trying to use a technology for static documents to develop dynamic and interactive content (i.e. wrong tool for the job). I feel that this is exactly what is happening with web applications and projects like Electron.
And then a user pointed out that Acrobat Reader can actually do that already [1].