Technically what he says is true but it isn't a fair comparison really. That year old (I'm not exactly sure how march 2012 is more than a year and a half ago) GTX 680 still retails for ~£390 upwards on its own. No, a next gen console won't be as powerful as a high-end gaming rig today. In a few years even low end systems will trump it with ease. However that would be the case even if they did use a high-end GPU such as the 680 or 7970.
Consoles can't be upgraded in the way a PC can, meaning to improve performance you have to buy the next version rather than replacing only a few parts. This next console version may take a very long time to arrive, while PC hardware is updated fairly regularly. However hardware stability and standardization allows developers to more efficiently use the hardware console gamers are using. So in the end games optimised for consoles can outperform those on a more powerful PC that the software has not been optimised for - at least in the early days of the consoles lifespan before hardware moves way ahead again.
Consoles can't be upgraded in the way a PC can, meaning to improve performance you have to buy the next version rather than replacing only a few parts. This next console version may take a very long time to arrive, while PC hardware is updated fairly regularly. However hardware stability and standardization allows developers to more efficiently use the hardware console gamers are using. So in the end games optimised for consoles can outperform those on a more powerful PC that the software has not been optimised for - at least in the early days of the consoles lifespan before hardware moves way ahead again.