Notice the difference:
I find this fascinating. From the newspaper to the web to mobile, there is a definite difference in when people read the news. Now we are seeing something similar with the move from the web/computer to the web/mobile.
Some of this has to do with form factor (the tablet is easy to read in bed while computers and laptops are not) and some of it has to do with social acceptibility (it is easy to read the news on your work computer but it is generally not acceptible to read a newspaper at work).