In 3-5 years, the demand for Bulky pcs will be niche. Similarly, demand for high power server processors will be niche, because the bulk of server loads are better served by many low power processors, than single high power processors.
Everyone will be using a table or phablet, and little plug in Android/ios devices coupled with 4k2k tvs will be replacing dedicated pcs. Given the terrible smart tv interfaces, no-one will be using inbuilt smart tv interfaces (of course).
I foresee many services turning to large touch screens with inbuilt dedicated processors, rather than generic high power processors, and work pcs will be touch based with projected keyboards, rather than mechanical keyboards. Further still keyboards and mice will be completely replaced by voice recognition and touch screen. And then touch screens will be replaced by motion detection devices.
In 20 years, some smart bugger will say, "Hey, there are economies of scale if we just build one general purpose processor that can do everything, rather than dedicated little processors for everything" and he/she will be regaled as a visionary thinker/business person, and an alternate company will have an epiphany and release a competing product, and then they'll be competing on speed, then price, then product range, and the whole cycle will start again.