The phrase 'Jack of all trades' springs to mind for some reason.
And of course the gateway itself becomes far more easily upgradable, a nice change from the mostly dumb broadband boxes sold today.
So they can guarantee that the box will have the CPU and storage resources required to meet forthcoming protocols? Let's look at this through the filter of IT history.
Are they really suggesting that such a generic box that was originally used to process ADSL 1 and to distribute IPv4 packets around could be upgraded to support G.FAST and IPv6?
Or that a box that originally rendered SD video in the early 00s by offloading decoding to the cloud would still be capable of rendering 4k video this year? Would they have had the foresight to fit it with an HDMI socket? Would it have enough grunt to throw that many more pixels around?
These would have been either a miracle of engineering or an expensively over engineered solutions. I'd be very interested to know how they implement a DAC in a way that can be upgraded.