Spaces, Time Machine, Stacks...
Useful things which really change how you use a computer and are useful in work environments.
Spaces and Time Machine most dominantly.
Spaces lets you have a clutter free work environment while you do something, and then let you go to maybe a hectic, packed environment with lots of things you need to do at once. I would say that that would benefit a work environment of some description.
And say you need several apps open but maxed out in full screen, yet using expose isn't that useful (An example I find is using Final Cut Express and LiveType at the same time since the app is made of separate windows and using expose can just make things more confusing) or if you don't have a mouse with more than one or two buttons.
Time Machine is useful for obvious reasons, and stacks lets you navigate to documents quicker and easier since you only have to click an icon on the dock to find what you want.
And there things like To Dos in Mail that makes Leopard more productive and so on. Leopard really caters to everyone in terms of useful updates. Sure, it may be bloat to some people but it could be a really useful feature for others and Apple does a good job at supplying for everyone. The average consumer AND the guy who needs to do serious work. It's not as bad as you most people think 🙂
I can't live without spaces, its so useful, ive setup 6, each app gets its own space, or if I'm doing a project, it gets it own space, a space for work, a space for fun, a space for an important project, and space for ichat, skype, yahoo and what not. Spaces is the most useful feature in my opinion. I just setup Time Machine, right now its pretty much useless, but after 6 months, i may find a use for it, i mean, backup isn't something to get hyped up about, though the core animation in TM is awesome. stacks is also useful. I've used every single feature leopard added, besides the little tweaks like voice over, so leopard, in my opinion, is amazing. though it is very buggy, when i wake my imac from sleep, it takes like 5 seconds for the mouse to appear, very annoying. Safari does give frequent crashes locking up certain parts of the system.
Stacks, Time Machine, etc. Are just little things to get people to upgrade. Same thing with Tiger. Dashboard, Spotlight, etc. Just little gimmicks.
The only time to upgrade, IMO, is when all (or at least 90%) of your 3rd party apps work on the next gen OS.
As for me, it's too expensive, plus a lot of my favorite apps don't work on Leopard yet.
Leopard's upgrades are even bigger than adding spotlight and what not. But if you think about it, you were probably hyped about spotlight and dashboard, but now, you're used to it, we'll maybe get used to spaces when 10.6 comes out. So leopard is a great upgrade, a little buggy, but, its been great for me, no real problems
😀.