As Japan Airlines (JAL) says, it is looking at its operations from every angle to find ways of reducing weight from aircraft, even if it is just by one gram.
We'd also caution you that when the tablet is docked inside the keyboard the weight distribution becomes lopsided -- so much so that unless you angle the display just so the whole thing might tumble backward off your lap.
The Polaroid iM1836 even captures wide-angle panoramic shots for impressive landscape photography without the added cost and weight of high-end equipment.