Augmented Reality (AR) superimposes users' real environment
with digitally created content. In the recent past, the AR
application "Pokémon Go" has gained particular
recognition. On November 11, 2017, however, Süddeutsche
Zeitung published an article entitled "Pokémon Go was
only the beginning." The paper reported that "All major
tech companies [...] consider Augmented Reality (AR) to be one of
the most important technologies of the future" and in
particular, Apple, Google, and Facebook were investing billions and
competing in developments (http://www.sueddeutsche.de/digital/digital-das-ende-des-echten-1.3733071).
According to Digi-Capital, the investment volume in the start-up
sector alone amounted to US-$3 billion, although admittedly four
start-ups (Magic Leap, Improbable, Unity, and Niantic) are
currently accounting for half of this amount (https://www.digi-capital.com/news/2018/01/record-over-3b-ar-vr-investment-in-2017-1-5b-in-q4/#more-2065).
Nevertheless, it is
