That's the same tired argument that supporters of IGPs use. Sure, IGPs are getting better and faster, but it's a false equivalency to say that therefore, IGPs will finally pass discrete graphics capabilities.
Likewise, it's a false statement to suggest that just because wireless is getting better, and is finallly in the "acceptable" range, than it will somehow leapfrog over wired networking technologies. Just like the idea of an IGP leapfrogging ahead of discrete graphics.
Sure, perhaps the market for discrete graphics will shrink, just as the availability of cheap "acceptable" wireless (4G today) will likely slightly cut into the market for wired internet, but discrete graphics and wired internet will not lose their technological edge.
I recall seeing a comment from someone on this forum, who has a 50 Gigabit metro fiber connection.
That's what wired networking is capable of. Not wireless. Wireless will never catch up, IMHO.