I just had the following experience:

I was reading a 30 page PDF report on my computer screen.  At page 9, I decided that I wanted to finish reading this report somewhere else other than in front of my computer screen and possibly at a later time.  I decided the best thing to do was to print out the report, so I could take it with me and also note that I was in the middle of page 9.

Not counting the time I spent printing it and stapling it together, the cost at about 5 to 10 cents per page for the printer, the paper, and the ink was a total of $1.50 to $3.00.

If you add these instances up over a year, how much would it be worth for me to have a device that would allow me to avoid the printing cost and wait time yet allow me to take the article and read it at a place and a time of my choosing.

At some point in the future that I cannot predict, the price of the device will drop below how much it would be worth to me.  At that point, I will be a grateful customer of the company that sells the device at a cost below its worth to me.

Follow this link to the above musing that I posted as a comment to an article about Amazon’s Kindle epaper device.

By the way, the 30 page report was the one discussed in my blog post Is Stenographer the Right Role For The Press?