1. The New Expose: Expose now includes minimized windows. You will notice a faint line dividing minimized windows from unminimized windows. See the screenshot below.
2. Improved Video Conferencing: In Snow Leopard iChat video conferences run a beautiful 640 x 480 (twice the resolution) of Leopard and use 1/3rd the bandwith! You can now do a 3 way video conference in higher resolution in the same bandwidth it took you do one on Leopard.
3. Faster Boot Up/Wake From Sleep/Shutdown: I can attest the shutdown is blazing fast. Once all your apps are closed its at most 2.5 seconds for a 2.4ghz MacBook to turn off. Leopard used to take forever on my machine.
4. On the Fly Print Driver Downloads: Got a printer in the office you need drivers for? Not a problem, Snow Leopard will download via software update any drivers needed for printers connected over USB or that it senses on the Network.
5. Getting 7 to 10 Gigs back just for installing: When I started the Snow Leopard Install I had 244GB of disk free. After the install I had 256GB. Thanks Snow Leopard. This can be attributed to Apple ripping out the PowerPC code for all Major System Components and compressing Read Only files for the System.
6. Time Machine Backups Going Faster: Apple claims your initial backup to Time Capsule will be 40% faster, but what really is impressive is the speed that additional backups occur. They are prepared much more quickly, on Leopard you could expect to wait well over a minute for the backup to even begin.
7. 64bit Javascript Engine in Safari: Safari has gone 64bit if your machine supports it. What this means is one heck of a speed boost for Javascript. I ran SunSpider on my Safari and got 511.8ms . Chrome 2 pulled a 711 on this same test.
8. New Desktop Pictures: Apple finally got themselves some more aggressive background images. If you want Snow Leopards or Leopards in the wild you are in business with 10.6.
9. Tabbed Chatting in iChat: Well at least iChat has joined the ranks of Adium with tabbed chats.
10. Single Application Expose via Dock Icon: By clicking on any dock icon and holding reveals all windows associated with that application. Minimized or unminizmied it does not matter.
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