[AT&T Samsung Galaxy Note I717] littlewierdo:
Didnt your mother ever teach you if you have nothing nice to say, not to say it at all?

Yes, it was very simplified. I play around with building my own roms with my Captivate (I have six sitting around the house atm). Im pretty familiar with the differences between ICS and GB. Im also pretty familiar with Samsung's Android devices, considering I have 6 different Samsung Android devices.

So, you asked for it (albeit rudely), here is a quick break down of some of the major differences between GB and ICS and why many of these major changes will mean little to nothing to Note users unless you install a rom without touchwiz.

Graphics User Interface (GUI) improvements / overhaul.

Unfortunately, you wont see any of this because touchwiz is overlayed on top of ICS so the really nice black/blue backgrounds that are present on every window (any window with a black background such as the settings for your phone, settings for apps, etc) will probably be the only visible change to the user, and for those that notice, a couple of new fonts that Samsung 'may' utilize (Roboto).

Resizable widgets. Well, for those of you who use a different launcher, this is something that, well, quite frankly has been available via third party launchers forever. Hardly anyone uses the stock launcher (personally I use Go Launcher but I have purchased and looked at pretty much every launcher including ADW, Launcher Pro, SPB Shell, etc - over 15 different ones).

Multitasking. Alot of 'functional' changes have been added here but if you use a third party launcher like Go, Launcher Pro, ADW, you get very similar functionality. I might also add, people claim ICS has a better app manager. In my opinion, I dont like it, it tends to shut apps down much more aggressively than GB.

Recent apps button. Nearly every third party launcher has this functionality.

Improved Notifications bar including the ability to dismiss individual notifications. Nice but not ground shaking and with touchwiz, may not even work this way.

Face Unlock. Well, considering the security implications of this, I wouldnt use it. It has been proven a picture of me is all thats needed to unlock my phone (assuming I locked it using my face). Not to mention the amount of time it takes for it to work. And Samsung has to enable this functionality.

Camera improvements (with continuous focus, zero shutter lag exposure and decreased shot-to-shot speed.) Probably the most notable change about ICS is the improved camera capability, too bad I rarely use the camera. And anyone who does care about these changes is probably using something other than their phone for pictures (ie they are professional photographers).

NFC (Near Field Communication - the ability to basically utilize RFID to make the phone perform certain tasks automatically or for authentication for things like purchases). Nice, too bad vendors dont use this. Also too bad that Samsung didnt implement the NFC chip the phone has in it. Probably the only functional thing this will do for me personally is, I can place an RFID chip on my desk where my phone sits so that when I place my phone near it, my phone can be automatically programmed to turn off the ringer (see an app called Tasker).

While this list doesnt cover everything, most of the 'appearance' changes wont be noticeable to the user because Samsung's touchwiz overlay uses the same bland colours as Eclair.