Radically Better. Can't live without it. Slide tabs around. Pull a Tab off a set into a single new window. Reopen all pages from last session.
Many more features you will get hooked on so fast. Download it NOW.
I don't care about tabs, what I do care about, and has been available since 10.2 is the ability to make the Google/search window any width I want, very valuable to me, so that I can easily see & type long search terms when I have a long http address inserted while doing a "site:" search. Same with reopen all pages from last session, nice, but don't really care about it.
What would be radically different and I don't think we'll see in in our lifetimes

, is a superior print preview engine like the old IE had. Makes it much easier to print out a page on any printer, and actually get what you see in the print window, at the choosen font size.
I also hate, just hate FF because it doesn't allow you to see (like Camino & Safari do) the http address of a site, when looking at the history. That is very helpful in determining which page/link on a site you want to revisit. In FF, you just have the page title on display, which many times doesn't have the relevant info you need to determine if it's the one you want to click on...a huge time waster on FF that makes it utterly unuseable for me.
Unfortunately unless you use Thunderbird or some such mail client I don't know of any that are available on both Mac and Windows (Outlook is Windows only, Mac Mail and Entourage are Mac only, etc). It would be nice, but I don't know of a solution for mail.
Most people would consider the reverse to be true, i.e using the same mail client across systems is more important than having the same browser but each to their own I guess

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I only use net mail systems, nothing on my computer... odd man out I guess
While that is true, and is not a problem for most applications such as mail, for a web browser I would rather have a consistent environment with everything in the same place and all of my bookmarks the same without having to constantly switch from one system to another. I'm too busy to bother with the differences and have other things to do.
I agree, I prefer Safari to all others, except when I need to print out a page...which usually happens after I discover the printer out page sucks for formatting or font size, and then I have to fire up the old IE, to quickly make adjustments (saving me lots of time and wasted printing/paper/inks etc) for something close to what I can read well at a proper formatted size. I'd much rather be able to use the same browser on all systems...mail...meh, I don't care so much.
I'll wait for Leopard, since the final shipping (or perhaps even later update) of Safari 3, should be the most website friendly, given all the non-standardized coding crap the IE exerts on the net with their near monopoly of browsers. Yeah, lots of problems with Windows Sarfari could probably be traced to IE, and the need to try to work well with all the sites coded for IExploder.