Technology within the lighting industry is advancing with a lot of companies only just coming to grips with LEDs.
Within five years we could be lighting our homes and work places with OLED. This could revolutionise the use of artificial lighting and in some very exciting ways.
Do you remember old-style TVs powered by cathode-ray tubes (CRTs)? The biggest ones were about 30–60cm (1–2ft) deep and almost too heavy to lift by yourself. If you think that's bad, you should have seen what TVs were like in the 1940s. The CRTs inside were so long that they had to stand upright firing their picture toward the ceiling, with a little mirror at the top to bend it sideways into the room.