It's interesting that Microsoft has long been strong-arming hardware vendors into REQUIRING that they sell their machines with an OS(oh, any OS is fine *wink* *wink*). Now apparently they want to make sure you can't take Windows off of the device. This isn't so different from encrypted bootloaders on android devices.
Now that these mobile devices have advanced to being full blown computers in every sense of the word, they are still not referred to as such. They are not even referred to and single-purpose/special-purpose computers. They are referred to as consumer electronic devices or mobile phones. People are used to consumer electronics and mobile phones being proprietary devices, this is normal and accepted. There is still the pervasive idea that with desktop computer or a notebook computer that the machine is the PROPERTY of the OWNER of the machine. "This is my machine and you can't tell me what I can or can't put on it."
They idea of buying a laptop computer that you cannot, WILL NOT, run anything but the operating system shipped with it is just weird. If people aren't thinking of the device as a computer, but merely a telephone or a gadget, this idea doesn't seem weird at all.