So I got the moto 360 sport smartwatch yesterday. Accessibility options were simply to enable triple tap to zoom, and audio feedback ... which I couldn't hear anything (maybe I needed a headset on for it)
I'm thinking if the screen is too small to handle such a number of tabs, then a tab-panel setup is no longer a good tool for presenting the information and should switch to something else. But I'm not sure what all types of software and situations they're using this for (these are redesigns often of existing things).
I've done the popup menu thing before... I forget what we actually did. I'll have to go find a URL for the application... I seem to recall it was in Siebel OpenUI
But did the popup-button otherwise have the behaviour of the other tabs-- did you cycle through them with keyboard, etc?
I can tell from the desciption that these are not focus-activated tabs, but users will need to explicitly hit Enter to select it-- except the dropdown, this opens the dropdown and selecting one of those shows their associated panel.
I'm a bit tempted to instead build for them a traditional navigation menu except they're in-page links and content changes under them somewhat like tabs.
Then I don't have incorrect roles and we could use translated text for stating the "current" item is selected/open/displaying.