I completely agree. Potential useful they are. Critical no. Are there any
tablets that work well? I haven't encountered one.
As I stated above I'm not perfect either and I'm heavily focused on improving
the situation. I definitely think people here are making exceptions for the
sake of having the latest toy. I don't think the majority of people who are
actually buying these are trying very hard to avoid non-free software.
The last time I checked they still make paper books. You can still draw with
a pen, you can still paint with a brush, and a tablet is not essential for
any of the tasks which one might find these devices useful. In the majority
of cases laptops (and desktops more so) are what is going to make you
productive. There simply isn't a good business case.
If you really think it is more than a toy you better have something more
concrete. I can actually think of some much better examples. However I don't
think they are so great that it offsets any advantages in productivity and
possibly costs anyway.