Except for businesses that have used "mobile" products to force their employees to work more hours. Example:
a. Employee works 8-5 at the office with an hour long lunch.
b. Employee, during his drive to/from home, is called due to emergencies at the office.
c1. Employee, not paying as much attention to driving, wrecks car. (Extra resources used.)
c2. Employee, forced to work late, doesn't have time to cook dinner at home versus "going out." (Driving cost; the employee's environmental cost of the restaurant's lights, etc.)
c3. Employee, working at home after normal 40 hours due to an emergency, uses extra resources due to working more than standard work week. (Power at home, work = less relaxation = unwise purchasing = more resources)
I agree with the majority of you that state that the devices themselves are not responsible for the waste. (Smaller, more efficient) But, I agree with Hawkins' point.
But the change in people's lifestyles due to the technology causes more waste.
And, this doesn't even get into the fact that some older technology (rotary phones, "well taken care of" older vehicles, etc.) last for decades. (Compared to today's common "use for 3 years and buy new.")
Combine today's energy efficiency advances with a change in the "work/life culture" of the typical American, and you would have the sweet spot for "overall green."