If you are referring to the (presumably recently introduced) "Stack tabs" flag, from an end-user's perspective, it makes me want to rip my hair out because I do not memorize which tab is which in the stack, and considering I tend to have tabs open for long periods of time (almost like a queue), having a full list of them for viewing at all times is the only viable solution, rather than playing roulette and hoping to get what I am looking for or even better yet brute forcing what I am looking for. Side tabs should *really* be re-introduced, and to this day were the single tab system I and everyone I talk to with a wide-screen monitor was happy with. The only reason it was not very widely adopted is because people did not know about it, if people had known about it I can guarantee that lots of people (a large percent) who use Chrome would be using it, and be quite happy with it.
To answer any developers hopes that the stack tabs feature might help: No, no it won't. Unless I am just the wrong "use case" it makes me want to close Chrome because it is just so nonsensical. But, that's my opinion so take it with a grain of salt, other people who like side tabs could like it, I cannot imagine why, but I'm not going to speak for everybody.