Definitely worth a test ride next time you swap.Furry muff. I do have to admit not having ridden a roadie with discs.
I do still see it more a marketing exercise to sell more new bikes. Better braking performance has to be a good thing - but how necessary is it? I won't be buy one soon - but if it works as well as you say my next bike will be tested with discs for sure.
Don't get me wrong. I would love a new Venge (no idea why other than they look cool) and the lack of Discs would in no way stop me buying one.