A few days ago Ubuntu's 9.10 alpha 6 was released. After reading through some of the bigger changes here, http://www.ubuntu.com/testing/karmic/alpha6
, and not the blueprints, some features that were added will make a big difference in battery life, performance, boot time and the new user login interface is faster and will help for a speedier boot. Some of these new features where mentioned in Alpha 5, but i am gonna add them anyways.
Upstart: Upstart is an event-based replacement for the /sbin/init daemon which handles starting of tasks and services during boot, stopping them during shutdown and supervising them while the system is running. http://upstart.ubuntu.com/
IM: Transitted to Empathy which introduces the Telepathy Frameworkhttp://live.gnome.org/Empathy
GDM: The gdm 2.27.91 login manager is a complete rewrite compared to the version in earlier Ubuntu releases.
xsplash: No more Usplash(the boot splash screen), now this will be faster startup where a boot screen in not needed, Ubuntu starts you will see a black screen, after the BIOS POST, followed by the X-based splash screen (xsplash)http://www.youtube.com/watch?v=meZBPItW ... edded#t=26
hal deprecation(no more hal): for power management, laptop hotkeys, handling of storage devices and cameras maps has moved from hal to "DeviceKit-power", "DeviceKit-disks" and "udev"
intel video driver: The Intel video driver has switched from the "EXA" acceleration method to the new "UXA". This solves major performance problems of Ubuntu 9.04, but could use further testing to flag any regressions it may bring.
AppArmor: AppArmor is faster, read the whole list go to http://www.ubuntu.com/testing/karmic/alpha6https://wiki.ubuntu.com/AppArmor
Grub 2: Now uses Grub2 over GRUB "Legacy" boot loader. But there is a problem in the Grub2 where is doesn't recognize any other operating system(Windows, Linux, etc) because of os-prober not being installed, https://bugs.launchpad.net/ubuntu/+sour ... bug/430141
And always, there is newer packages(GCC 4.4), Kernel 2.6.31-9.29, Gnome GNOME 2.27.91 development release, ext4 default filesystem, and etc.