Ice Cream Sandwich will bring a slight UI facelift, as well as numerous under-the-hood improvements regarding performance and battery life. It's a very stable operating system and reliable mobile OS, so users coming from Honeycomb will definitely notice a difference. It isn't known currently if Samsung has plans to update the Galaxy Tab 8.9 any further. Still getting to ICS is what's important when it come to Android updates, as it is the biggest step forward compared to the previous versions. Post-ICS updates are also good to have, of course, but bring smaller improvements.