The two things I do for a living have to do with reading/writing music and massive amounts of text. By the time I'm off work, I can barely focus on anything -- let alone an LCD.
Enter the Kindle. I now use it to do reader reports on people's manuscripts (sending the pdfs or word docs to myself to convert through Amazon or Calibre [sic]), and my eyestrain has lessened a bit.
The Kindle's a great reminder not to stare continuously at back-lit screens. The resolution's also quite pleasant.