With M2 out, openSUSE 13.1 is still in an early period of development and lots of changes are coming. The most notable list of changes made in Milestone 2 includes:

livecds using overlayfs now with persistent hybrid support
automake 1.12.1->1.13.2
boost 1.49.0->1.53.0
util-linux 2.21.2->2.23.1
evolution 3.8.1->3.9.1
gtk3 3.8.1->3.9.0
icu 50.1.2->51.2
iproute2 3.7.0->3.9.0
kernel 3.9.0->3.10.rc4
libreoffice 4.0.2.2.1->4.0.3.3.2
MozillaFirefox 20.0->21.0
pulseaudio 3.0->4.0
qemu 1.4.0->1.5.0

For Milestone 3 the major goals are to bring Perl 5.18 and GCC 4.8 on board. You can get Milestone one from software.opensuse.org.