It may be released in June 2003. It may be not. But rumours about the (a?) new MS Pocket PC OS 2003 are around the net.
Some people say the new version is going to be another bug fix release. Some actually say this will be a major revamp on the platform. No word about installation of this OS in older devices with ROM space available. This depends on the manufacturer decisions.
The best list I've seen is on PocketNow, and includes this:
Secure WiFi (802.1x) support
Zero Configuration
New user interface
Native Bluetooth Stack
OS stack
DUN, object push, serial port profiles
OTA configuration manager
Inbox, SMS, instant messenger
“Always Up-to date” Syncing
Improved scheduled syncing
“Titanium” SMS notifications
Messaging services enhancements
SMS: Contacts name lookup and direct call back
MMS plug-in (native to inbox)
New Connection Manager
Power management with unattended apps
Email signatures
Improved time-zone handling
Vcard and vcal support
Today/Homescreen plug-in divided for multiple mail accounts
Color weekend appointements in calendar
Scrollable summary and attendees list in calendar
Free appointments don’t show conflicts with other calendar events
Network selection UI
New Connectivity notifications
Support for WinCE v4.2
Increased stability and reliability
Layer 2 Tunneling Protocol (L2TP) / IP Security Protocol (IPSec)