Remember when road hubs were a standard 126mm before 8-speed shifting came about from Shimano and the industry gravitated to today's standard of 130mm? Of course not. Some of you guys don't know too much history of road cycling. Eddy Merckx never used 130mm. Things change. And there is a ton of more momentum for a change to 135mm than there ever was when road hubs went from 126mm to 130mm.
There already is a TON of rear wheel dish on the drive side. Then, you add in a disc on the non-drive side while keeping hubs at the same 130mm?!?!?! No way! The industry has to go to 135mm hubs to preserve wheel strength. And when you look at the trend going now with Cyclocross bikes with disc hubs... Any decent high-end cyclocross bike that has disc brakes have 135mm hubs. That Colnago road bike with discs? It's 135mm. That high-end Look Cyclocross with discs? It's 135mm.
This is where it is headed. 135mm hubs. MTB, Cylocross, and now Road. Mark it down.
I remember when spacing was narrow. I'm sure many others on this forum remember too. In fact, I still have an older steel Basso that I had put in a jig and cold set it wider to accommodate the 8 spd stuff when it first came out. So for you to say "of course not" is a rather arrogant statement imo.
That said, if disc brakes are going to be used on a road frame, then yes, 135mm spacing is pretty much a no brainer. I have a steel touring bike that I built over 10 years ago which has 135mm spacing. Nothing new for touring bikes, allows building stronger 700c wheels on durable mountain type hubs to be used with a wider range of derailleurs and gears. Discs certainly have their applications. I just don't think it's necessarily a no-brainer that they will be on every high end road racing bike in the future, where weight is such an overriding concern. If they can build them equally as light, then maybe. I don't profess to say braking on carbon rims is very much fun in the wet, and disks would at least solve that. But their use on high end road racing bikes raises many other issues, which have been discussed here and in other threads. Some good, some bad... there are tradeoffs both ways. It's an interesting discussion. I'm not in any hurry to get a disc equipped road bike, but I wouldn't rule it out a few years down the road if it becomes obviously superior. But that "if" is pretty big in my mind at the moment. Quite happy with what I've got. Maybe I'm just a "show me" kind of guy.