Going by precedent, Samsung will atleast push two upgrades over the air to its flagship products and Galaxy Tab 10.1 being the flagship competitor to iPad 2, one would expect this to happen. There are already rumours around the net to that effect.
Getting the phone functionality even if Android 4.0 is pushed to Tab is another question. If Samsung is keen on maintaining the status quo of Tablet being primarily an internet device, it might not do it. However, Android 4.0 being open source, ROM makers around the world might already be jumping into making ROMs for the tab. Samsung should atleast consider doing this itself on a cost to the customer and I’m sure people would flock service centers to get the phone functionality built into their tabs.
Lets hope for the best.