Digital license plates are now allowed in Michigan (read comment)
theverge.com
theverge.com
"As used in this subsection “digital registration plate” means an electronic display that is mounted on the rear of a vehicle in place of a registration plate issued by the secretary of state. Any data collected by the department or by a vendee selected by the department through the use of digital registration plates is the property of the department. Any use of data collected through the use of a digital registration plate is nonexclusive and is governed by this act."
Source: http://www.legislature.mi.gov/documents/2017-2018/publicact/...