Terminology vs hyper
When comparing Terminology vs hyper, the Slant community recommends Terminology for most people. In the question“What are the best Linux terminal emulators?” Terminology is ranked 11th while hyper is ranked 25th. The most important reason people chose Terminology is:
Font size in Terminology automatically scales according to window size. When you resize the window, so does the text.
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Pros
Pro Scalable fonts
Font size in Terminology automatically scales according to window size. When you resize the window, so does the text.
Pro Looks smashing
Terminals are often very dull looks wise, not so with terminology.
Pro In-terminal video, picture and thumbnail support
Thumbnails, pictures, and videos can all be rendered in-terminal, based on the directory listing or mouse interactions. For instance, using "ls" on a picture folder will produce a list of thumbnails instead of only the filenames.
Pro Splitable
You can split windows, like in terminator.
Pro Visually customizable
It is very customizable in every aspect of the visual options.

Pro Integrates well with Enlightenment WM
Terminology is part of the Enlightenment WM packages. As such, it integrates really well with Enlightenment and other tools in the package.
Pro Block copy
You can copy text in blocks.
Pro Copyfree licensing
Terminology uses the Simplified BSD License. As it is a copyfree license, it tends to minimize license incompatibilities, legal compliance requirements, and various other complexities that may make it difficult to understand certain licenses.
Pro Cross-platform due to electron browser-based foundation
Although not Windows-friendly. But nobody uses Windows terminal anyway.
Pro Built on electron, supports split panels and plugins
Cons
Con Configuration is sometimes complicated and non-obvious
There's a "Settings" menu for configuration, but more options there would make it easier. Downloading themes and extensions from the official repo would be a big plus.
Con No True-Color support
Not able to display a modern full range of colors, yet.
Con Scrollback is completely nroken
Scrolling back the emulator inserts random lines from other places in the scrollback buffer in between the actuall output lines. Thus it is impossible to see a correct copy of the previous output.
Con No scrollbar
The lack of scrollbar in Terminology makes navigation difficult. But you can use keys for it.
Con Too many bells and whistles
Some people feel that Terminology has too many features that are not suited for a terminal, but for a window manager instead. For instance, viewing thumbnails, watching videos and gifs, and other similarly flashy things just feel like eye candy and should not be part of a terminal emulator.
Con Made with Electron
It uses a considerable amount of resources, compared to other offerings.
Con Not as cross platform as advertised
Most features only work on Mac OS.
Con Incorrect rendering
Terminal window has visual artifacts.
Con No configuration UI; all options must be set via JSON
Con Still maturing as of December 2016
Folks noticed some issues in the 1.0 release cited here.
Con Difficult to find information about it, because of the confusion with hyperterminal
