What version of Unity will be used in 12.04
Solution 1:
In Precise Pangoline, they have already upgraded the Unity package at the 5.6 for Unity (as stated here in Launchpad) and Unity-2D (as stated here in Launchpad)..besides, in the 5.4 version of Unity, they released the new feature, HUD, as explained by Mark Shuttleworth (you can read it here).