Something with a decent HID will always be around. It might be a tablet with a keyboard and mouse but it will always be around. The platform to consume content will relentlessly evolve but content creation has a pretty standard set of requirements for those humans that do it. This paradigm will drive the PC market to the niche where it might belong. Stuff that is truly creative and commercially viable generally isn't produced on an ipad and uploaded to youtube for your 31337 friends to fawn over. Yes, the bar to create this kind of stuff has been lowered but it still requires actual talent to do it.