I just assembled a new (fairly top of the line) computer at my house. And for the first few weeks I played on it, installed software, tweaked, etc.
After that I just started using it for email and the web.
Then I got an ipod, and I do all my facebooking, light websurfing, emailing, etc on there. I only power on my computer any more when I want to get some programming done. I don't even use Word all that often -- generally only to open a file that someone has sent me, or is a legacy file from my old computer.
While the general computer will never be replaced (especially at work, or for work-at-homes) I'm seeing a real trend in the desire for single-use, no-fuss hardware applications (the post on Hacker News about TurnKeyLinux is a good example).
For me: Watching Movies at Home: PS3 and a NAS Listening to Music at Home: PS3 and a NAS Music/Video on the Go: iPod twitter, email, facebook: iPod Touch light web browsing: iPod Showing pictures: Net-enabled Photoframe