Originally Posted By: 97tbird
Oy - really? When you say existing setup, are there any special minimum requirements/specs that are needed to run 11.04? i searched but couldn't find any.
Neither could I. I am pretty certain, though, that Unity uses a lot of 3D fancy-pants stuff; but also has a fall-back if it detects that your hardware won't support it. It's a brand new interface (albeit the one that they'd been using in their mobile and netbook editions) and there may well be some hiccups as it is first released into the wild!
Originally Posted By: 97tbird
I mean why would they release the Unity thing if they had any doubts that it would not work/cause problems with existing 10.10 users?
Backward compatibility and user familiarity are sometimes casualties in the march of innovation. Google the KDE 4.0 fiasco/ debacle for more info.
Also, not having any doubts that their new technology is going to be awesome does not in any way guarantee that their new technology isn't going to be a total mess.
Ubuntu and many other distro's sometimes intentionally release some versions to test bleeding-edge technologies. (Ubuntu's first release with the pulseaudio sound server was a disaster; but their millions of users tested and provided feedback and it gradually improved.) Ubuntu releases their "LTS" (Long Term Support) versions every 2 years and it'd probably be best to stick with those (or use Debian) if stability and support are important; as the in-between releases are geared specifically to "move forward". Using anything besides LTS releases puts you in a position of being a guinea pig tester to at least some degree: This is the nature of the open source world: You contribute by testing and using the software.
Originally Posted By: 97tbird
i, of course am a novice, so if you could shed any light on this/expand on it, i'd appreciate it.
SrDriver's post preceding this one is probably the best advice: If you wish or need to, just choose the Gnome session for your login and you may never have to deal with Unity again if Unity turns out to be not-so-awesome.