For people who only watch streamed TV the bandwidth adds up fast. All our TV is streamed online. I work from home and am VPNed in all day as well. Through work I get to participate in software beta programs and have to download the releases. This week I had to install vSpere 4.1 at a client's site so there was a few GB's of downloading. I have a home lab with 2 VMware hosts, 5 Windows servers, 3 Linux servers, 2 desktop PCs, and 3 laptops so every time patches come out that's a good amount of downloading. I purchase and download all my games through Steam. I play Xbox Live! a fair amount and purchase DLC for my games. When Windows 2008 R2/7 SP1 was released, I logged into Technet and downloaded the x86 and x64 ISOs. That's almost 20GB right there.
I literally laugh out loud when people say 250GB is "enough" and anyone that uses that much is "abusing" their internet service.