In the continuation of the article on
CSS layouts and
this comment, the thought arose that with a sufficient width of the screen, in the near future it will be possible to open two tabs simultaneously in one window.
For example, you have a wide screen with a resolution of 1600x1200. You open a tab with Habr, open a tab with Wikipedia for example, and then, while on the active tab, hold down Ctrl and click on the second. Due to the sufficient width of the screen, both sites are open at the same time and you can safely quote / copy-tag :)

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There are many uses for this. Ideally, you can even ensure the interconnection of web applications using browser tools. You can implement drag & drop, you can implement site administration, anything.
Accordingly, the combined tabs will be highlighted with an icon, they can be shared, connected with others, and so on.
And what thoughts on using such an idea did you have?