PCs have everything: games, series, films, DVD, BD, music, streaming, internet, books. You can do all that on PCs.
Yet, people still read real books, collect real comics, watch films on a TV, stream TV content using boxes like Apple TV and obviously play games with a console.
This idea that PCs will be the entertainment central and would kill consoles and such is very old. Yet people still own lots of boxes to plug to their TVs. Consoles will always be one of them.
Consoles are still very plug-and-play regardless of content download and installation. Perhaps with cloud computing and streaming consoles will miniaturise, but I don't see all players just having to deal with PCs to get their gaming fix.