Flatscreen TVs that 'snap together' to automatically make larger TVs. Tired of your small 25" TV, just buy a new one and combine them together to form at 25"x2 widescreen TV, or combine 4 of them for a 50" bigscreen.
The TVs would need to 'recognize' each other and automatically adjust
the picture to fit. Colours, tones, and brightness between the TV should be automatically adjusted when the TVs are combined (manual adjustments would also be available).
Of course every combination wouldn't be 'perfect' (ie. an 'L' shaped TV would be odd) but that's up to the consumer to decide what they want. Options to center a 'best-fit' regular-ratio TV image inside whatever size & shape you have would be included.
The connection process should be made so easy, that joining and unjoining the TVs could be a daily occurence - if the entire family is watching a movie they could use all 6 TVs, but if little Johnny wants to play Xbox he can just 'unsnap' a TV and take it to his room.
The exact sizes and ratios of available TVs should be calculated for the most options for consumers. eg. 2 'small' TVs should fit perfectly beside or on top of 1 'medium'.
The remote controls would need to be 'smart' also and give the consumer the choice between letting each remote control the combined TV, or designating a one main remote (would you really want every person in the room to be able to change channels??? Some people might, but it sounds like an argument waiting to happen to me).
I think this would be good idea for manufacturer's to ensure that people keep on buying their brand. Why buy brand Y, when you can join another brand X to the one you already own.
Maybe we don't have the technology yet to make a flatscreen TV with an 'edge' or border of some kind. But if we do, or when we do, I think this would be 'a good thing' (oops, thought I was Martha Stewart for a second there :-)