Tina Turner could return to the stage as a hologram – two years after her death. The company that manages the US star’s estate has filed an application to trademark her name in virtual reality. It would allow for the Proud Mary singer to be beamed out in arenas in digital form to sing her greatest hits. Legal papers asking for a global trademark show the name Tina Turner has been registered for “use in virtual environments; entertainment services, namely, coordinating and facilitating virtual