I'm one of those users
I'm using an i5 laptop with windows 7x64 and 8GB of ram and even that isn't enough for me...I have a second desktop with similar specs and a 4u rack server at my disposal if I need more horse power! Why? I manage hundreds of servers across a dozen datacenters and at any given time, I have 10-15 remote desktop sessions opened...and these things take their toll on my poor laptop. For me to do my job properly, I need horsepower, tons of ram and a wide open network...otherwise things slow to a crawl!