  There is a persistent state of confusion regarding the nature of the Unruh
effect. We will argue that, in contrast to some interpretations thereof, the
effect does not represent any novel physics and that, by its very nature, the
effect is fundamentally unmeasurable in all experiments of the kind that have
been contemplated until now. Also, we discuss what aspects connected with this
effect one might consider as possibilities to be explored empirically and what
their precise meaning may be regarding the issue at hand.
