Dark Water Muse does the math for you:
In this piece DWM does not explore other possible ways that a tablet does things differently to a smart phone, net book, laptop or desktop computer. This is not a general review of tablet capabilities. It can be considered an update to DWM’s eReader versus Book piece [Ed: linked to from this post last week] with emphasis on the cost of the use of the tablet as an eReader.
Since DWM is focused on eReading then cost is an influential factor when considering any eReader device.
If you trust DWM to do the math and you don’t want to review DWM’s work (included further below in the section entitled “The Math”) then you can read the results in the Table #1: comparison of relative eReading costs below.
If we assume the average book price is $20 and eBooks are discounted by 40% (a gracious discount from DWM’s experience) then we get the following equation for N, the number of eBooks you must purchase and read on your new device to ensure you’re not paying more for the content you could have read as a book:
N = cost of device / $8
Table #1: comparison of relative eReading costs: The following table indicates the number of books N you must read on the corresponding eReader on the market today (prices taken from the web as of May 15, 2011) in order that the cost of the device does not drive up the cost of eBooks you read.
