Why? When we're talking about overall usage, functional replacements are far more relevant than direct device-category to device-category comparisons. In much the same way, the fact that my mom has replaced her desktop with a tablet is the directly relevant comparison for my mom's "electricity usage due to personal computing".
Why? When we're talking about overall usage, functional replacements are far more relevant than direct device-category to device-category comparisons. In much the same way, the fact that my mom has replaced her desktop with a tablet is the directly relevant comparison for my mom's "electricity usage due to personal computing".