We can only fit so many windows in the Alt+Tab without making them very tiny, so some scrolling will be necessary. We explored making it only scroll once the last window is selected, but that has the same issue. An alternative could be a paginated scrolling, where we scroll the whole panel instead of one window at a time. Would that address your issue?

That might work, though you could also do linebreaking and go onto the next line. The most important thing is that the targets don't move around on the screen. 

Something like http://worldofgnome.org/uploads/2012/10/alt-tab-linuxlex.png ?

With enough open windows, pagination would be necessary at some point no matter how you arrange the thumbnails.

@estade this is a pri-3 but if you have the chance it would be interesting to try making Alt+Tab paginated.

The selection window would move instead of the app previews, and when it is about to go offscreen the next set of app previews would slide into view and the selection window would go back to the first one.

=> sgabriel for design input. The current behavior is wai.

Seems like pagination would be even more jarring. Is this request coming from UX ?

I'm not in Chrome UX, just a user. I filed a bunch of bugs (including this one) before I collected my concerns into a document. Not sure if you want to keep these bugs open.

https://docs.google.com/document/d/1PUjNC9hSTTnKLhrmu6VFd2efia0xdpACEKnTX5lDq2s


I know it is not planned right now, but a UI extension system like GNOME has would allow for much flexibility in experimentation with these concepts.
https://wiki.gnome.org/Projects/GnomeShell/Extensions
https://extensions.gnome.org/extension/15/alternatetab/

Ah yes I remember this document. Thanks for putting that together. 
Happy to try pagination if somebody wants to own that and have it behind a flag, I however don't see working very well in the current form of Alt-tab.