"Meet the new boss; same as the old boss" - The WhoI'd say it's a matter of perspective. If you upgrade your hardware relatively often, then you're basically getting incremental advances over the previous technology. If you're like me, on the other hand, and you have a Macbook Pro that was built in early 2007, then Snow Leopard feels like a breath of fresh air.
Until recently, I much preferred using my iMac (late 2008) because it felt snappier. With Snow Leopard, I've taken to carrying my laptop around the house again.
So while it looks pretty much the same as it did under Leopard, I'm definitely using Snow Leopard a whole lot more.
On a side note, if anyone would like to loan me $2500 for a new unibody MBP, I would definitely appreciate it.