- Change to systemd
- Unity 7.3
- Compiz 0.9.12
- Linux kernel 3.19 (4.0 didn't make the cut)
Application updates:
- LibreOffice 4.3.2.2
- Firefox 37
- Thunderbird 31.6
- Shotwell 0.20.2
- Nautilus 3.14.2
- Evince 3.14.2
- Rhythmbox 3.1
- Totem 3.14.1
- GNOME Terminal 3.14
http://www.omgubuntu.co.uk/2015/04/ubuntu-15-04-download-new-features
If you do fancy shoving kernel 4.0 into it: http://news.softpedia.com/news/How-to-Install-Linux-Kernel-4-0-on-Ubuntu-15-04-478288.shtml
