When it comes to interactive displays, Dell has been thinking big – really big. The C8621QT 86 4K Interactive Touch Monitor goes beyond most big classroom displays with a spacious 85.6-inch diagonal screen that shows 4K resolution and can respond to up to 20 inputs. It uses passive pens and has a slot for an integrated PC but the display’s bonus for education is its Screen Drop feature that slides its image down. This way, the C8621QT 86 can accommodate short students or those in wheelchairs by rolling the screen down to their level. The display is expected in early April for around $10,000.