One bike for everything?

I just pulled the trigger on a 2013 Salsa Vaya. http://salsacycles.com/bikes/2014_vaya_2

We'll be picking it up Friday. I was thinking of culling the herd and donating the GT Outpost Trail, my much-loved utility, errand bike. It's just too dang heavy and slow. My LBS is transplanting her bits to the Salsa. I will keep the Mavic wheels to set up for winter riding because they're also disc compatible.

One bike for everything, I would say it is difficult to get decide one bike for everything, it totally depends on the requirement and budget of the person and it varies from person to person. For an instance, I have got a fixed gear bike from http://www.criticalcycles.com/ which I use personallly to commute to work and for exercising purpose because it helps me keep myself physically fit.
My bro uses the same bike and thinks himself a hipster :D but I like his spirit, he tries and does some good skid trick and other tricks too. Also he uses it to go for a long ride with his friends twice a tear which is a good thing. The bike has a strong aluminium TIG welded frame and looks good, atleast to me :p