Some of us still live in rural areas of the country where reliable DSL is hard to come by much less broadband that would support effortless streaming. I still buy all my media in hard copy and rip it to my computer because it's not worth it to wait several hours for a song to download.
My Macbook is on it's last legs, I'd just started saving last month to replace it. So far the MBA doesn't look appealing to me due to it's size and storage capacity.