As far as I understand I could use the nucelo board LTDC Display interface. It needs sufficient RAM for the frame buffer and a DMA2D, all this apparently without any CPU intervention. On the other the display is non interactive and would show only terminal messages. I could then use a SPI interface display which some also come with SD card reader integrated.
Don't know maybe someone could advise from experience what would be more easier to go with and if so also recommend a display unit...?