Lenovo is exploring a creative new format for laptops and has unveiled a transparent-screen prototype at the Mobile World Congress (MWC) in Barcelona on Monday. The Chinese manufacturer says the laptop, which has a glass screen and a surface that can be used as a keyboard or digital drawing board, will enable a new level of interaction and creativity. The device is intended to make work easier for graphic designers and other creatives who can use a special pen to draw the objects they see behind – or through – the laptop screen. Travel agencies and hotel reception areas could also use the lapt…