I highly doubt it'll be better than OSX or XP or Vista or Windows 98 for that matter
Why do you doubt it? When Workbench 3 and above are already better than the alternatives (I can only assume what OS4 is like as I don't have PPC)!
In case you have not noticed all the latest versions of Win and MacOS are sluggish and unintuitive next to the humble Workbench.
If you mean "better" in terms of sales, then you would probably be right.
If you mean "better" as in ease of use, flexiblity, efficiency with it's usage of system resources, or even just prettiness. You would be waaay wrong.
So there!
