All Android end users want to know if they are eligible for the latest Android update and the same goes for the latest in the Android's treat arsenal - Ice Cream Sandwhich (ICS).
Users of the Acer ICONIA Tabs A100/A101/A500/A501 may be in for some early luck with a leaked report from Acer Poland, pointing towards ICS heading towards Acer's A-Series of ICONIA tablets in mid January 2012.
Acer has generally been quick with their updates, so while there is no official confirmation on this matter, we can expect it to be reliable.
source - Android Authority