On the Citation
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Citation says that implementation of Holography had to wait the emergence of laser twenty years later. That means: 1947+20=1967. However, the first laser was successfully constructed in 1960, and the basic ideas were indeed rewarded by the 1964 Nobel Prize in Physics. Then, my suggestion would be to modify that phrase as next: “…and had to wait the emergence of laser years later.”
Omitting 'twenty' seems a good idea to me.
Implementation of holography surely did not happen immediately the laser was invented, it only became possible then.
So perhaps the actual use of lasers to make holograms was atv some later date (that someone can tell me)?