Here is a compiled list of what is new in 10.2
Quartz Extreme - GPU hardware acceleration
Universal Access: Quartz 'zooming'
Universal Access: Read back text from all apps
Universal Access: Invert screen
Ink - global handwriting recognition
Finder: multithreading
Finder: Services
Finder: Spring-loaded folders
Finder: Open With.. contextual menu
Finder: Automatic thumbnail creation
Finder: Integrated search
Finder: SMB browsing
Finder: WebDAV/iDisk speed improvements
Finder: Set text size
Finder: Set label position to bottom or right
Finder: Show item info
Dock: removed pin-stripe background
Get Info window with collapsable panes
Python, fast CGI, TCL, Ruby
X Server: Server optimised JVM
X Server: Disk, print and email quotas
X Server: "headless" operation
X Server: Improved LDAP, AD, Kerberos support
X Server: Netinstall, Netboot
System Prefs: various panes renamed
Mouse shadow
Pulsating gumdrop of death pointer
Draggable minimised windows
SMB compatibility, bug-fixes
SMB Server
Printer sharing/networking with Win/Mac/Unix - CUPS
Quicktime 6: improved speed, efficiency
Quicktime 6: MPEG4 support
Genie effect window closing
Update Terminal.app
Improved scrolling
Mail.app: threading, stability
Mail.app: expanded filter criteria, use multiple filters
Mail.app: Exchange support
Mail.app: Merge mailboxes, use 1 mailbox for all mail
Mail.app: label emails
Mail.app: intelligent spam filter
Mail.app: start IM conversation in iChat
Mail.app: search over multiple mailboxes
New global Address Book with vCard, SMS, Bluetooth
Sherlock 3 - web services, channels
Java 1.4 - new functionality, improves performance on other platforms
Simple Finder for kids
Quartz rendering for Carbon Quickdraw apps
Universal Access improvements for disabled
Bluetooth support
Visual Eject key feedback
iChat - integrated AIM compatible instant messaging app
Quartz anti-aliasing for Carbon Quickdraw apps
Application icon on minimised windows
Improved GCC compiler for overall system performance
Other optimisations, bug-fixes
IPv6, IPSec
FreeBSD 4.4 base
Windows VPN compatibility
Improved Disk Copy app & CMM modules
Rendezvous - automatic device discovery on IP
Developers can use brushed metal look in Project Builder
iPhoto 1.1
New Digital Hub preferences
Preferences for enabling, configuring built-in Firewall
Some are just so-so; but some are pretty damn cool.
enjoy
