There are plentry of larger type (2.5 inch and 4 inch) displays available for Raspberry Pi however most are unsuitable for Arduino due to the connection (eg HDMI) and the way they have to be driven. I also note that the Wio Terminal device already has a larger display. It would be great if the Pimoroni Hyperpixel 4 display could be available in a format to suit Arduino. At present the use of the 40 pin Pi header and installable driver makes it tough.
The small sized grove i2c oled displays are great to work with so all I am seeking is a larger size version. Hopefully extra features will include typeface and size. It would be nice to be able to draw graphs onscreen. Touchscreen is an unnecessary feature.