For who follow close the mailing list, this is not new, in any case see below a part of email exchange between Scott and Daniel:
Did that patchset get submitted to the list for review? If not, will it
No. These patches breaks many of the core goals of wayland/weston with DE-like features.
<krh> weston isn't going to be a full DE, starting a new DE is specifically a non-goal of wayland
<krh> and I've always said that fleshing out wl_shell will have to wait until we have at least one real DE to driver the work
<krh> otherwise it's all just going to be guesswork
So we're going to be doing a lot of guessing. As it turns out, the
best way to have a good idea is to have a lot of ideas. So we're going
to try and guess what some of the better ideas might be.
I definitely don't see it that way, and without being able to speak for
Kristian, I daresay he doesn't either. There's a big gap between not
wanting to start a competitor to GNOME, KDE, Enlightenment, XFCE, LXDE and
the myriad other environments, and adding titlebar buttons to XWayland. The
example clients shipped with Weston have titlebar buttons, so I think it's
fairly safe to say that a) extending the same support to X11 clients is a
useful goal, and b) including titlebar buttons is clearly not a non-goal for