Actually, multiple displays is the only solution for at least one development context. For writing and debugging common code, I see a tiling WM on a big display as in OP as a big advantage. OTOH, for web site styling and development with today's DEs, I see it only being counter-productive. For web styling, one cannot have too many different displays, because too many display-related environmental variables need evaluation. Display sizes out in the wild vary widely, as do device densities, not to mention viewing distances and visual acuities. Behavior, window sizes and text sizes on a Retina display can be vastly different than on a cheap cell phone, iPad, 14" 1024x768 laptop, 17" SXGA, 20" UXGA or 37" HDTV. Far more permutations exist than the few I listed. A web stylist limited to one display or just a few displays with similar characteristics, can't possibly test thoroughly, and thus can't be fully aware of the impact of his effort.

"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech,"

This means neither Congress, nor the states and their sub agencies (e.g. public schools) through the 14th Amendment incorporation doctrine, are permitted to take any of the proscribed actions. The courts have long been ignoring the second, "prohibiting the free exercise thereof".

Congress and the Supreme Court have been opening their sessions with prayer to God since their inception in the 18th century. Any purported prohibition on public school students doing the same is inconsistent with the above language of the 1st Amendment.