said by robbin:The large 4:3 type displays disappeared with the change to LED.
However, it was not a sudden and simultaneous cutover of production from CRT to LCD at the same time as wider aspect ratios were offered.
An awful lot of 5x4 LCD screens were made in 17 thru 19 inch sizes with 1280x1024 pixel panels (which I still use), and there was a very significant period (several years) when 4x3 and 5x4 ratio units were made in common sizes in both LCD and CRT, with few or no wide screens being built yet.
As a former reseller, I can attest to that.
LCD screens of ANY description were much more expensive than CRT ones during that time, and only as mass production was fine-tuned on LCDs did their costs and selling prices converge with CRT.
Wide profile panels were introduced as one means for manufacturers to accelerate that convergence.
If they had waited a bit longer, the general LCD price would have fallen anyway, due to mass production, and we instead would now still have more ratio choices in all sizes.