What I don't agree upon is that "NOBODY" would want open platforms; there's probably a larger market for that than there was a personal computing market in the 70's. There's businesses like Raptor that sell fairly open workstations, and they simply wouldn't if there wasn't a market for it.
The main issue is the disconnect between engineers/programmers and users. If there's growing amount of people who won't use the products they build themselves, then the idea of a war on general computing might snowball into a self-fulfilling prophecy where average users no longer has access to general computing through normal consumer devices.