Only looking at Ubuntu from a technical perspective is short sighted.
We have had a lot of strange developments over the years. Udev has gone from being the great tool of userspace device name policy to the daemon that oly changes the permissions on devfs device nodes. What???? That isn't what we agreed to.
When looked at from a certain light the choices of the systemd developers are not at all in the unix tradition, and there seems to be disdain for the unix tradition of doing one thing and doing it well. Furthermore systemd seems to be rewritting so many things so fast that we are losing hard won lessons from our history.
Will RHEL7 based on systemd and gnome3.x and Wayland be unix? Will it run my old unix applications? We have seen enough disdain for backwards compatibility that I am in serious doubt.
On the flip side there are a lot of stories of running a normal arm distribution in a chroot on arm phones that it seems clear there is still one kernel pulling these things together.
Every distribution has a libc.
So I expect we will continue to have the ability to run each others binaries if we care and open source is still an ideal so the differences do not look like the propritary lock in of the unix wars but more like the divrsity that leads to new and better solutions that we can still pick a best of breed out of. So I don't see this as a return to the unix wars but as something new and different in this world.
I do worry about the scrapping of evolutionary change, and instead this great jump
into revolutionary change that has left me unable to find a non-buggy desktop except debian stable. Last I looked our latest and greatest things suck. Perhaps somewhere in this grat diversity someone will get it right.