BlackBerry just announced the release of the 10.3 SDK Beta. Developers can begin getting their apps ready for the upcoming release of OS 10.3 later this year.

In announcing the new SDK Beta, BlackBerry also revealed the following on the BlackBerry Dev Blog:

“Another important note for developers is that BlackBerry 10.3 is targeted only for new device hardware being introduced later this year. This new hardware will follow our promise of keeping the square screen (1:1 aspect ratio) and 16:9 aspect ratio, including our common 720×720 and 1280×720 resolutions.

Also, when you fire up the 10.3 beta simulator, you’ll notice another square screen. This is for a new device with a 1440×1440 resolution and pixel density of 453 DPI.”

The most important tidbit being the new device with 1440×1440 resolution. What is this new device you wonder? Why it’s the upcoming BlackBerry ‘Windermere’, unofficially dubbed the Q30. As we discussed in the N4BB Live webcast yesterday, BlackBerry employees already have final revision Windermere devices in-hand. It’s now just a matter of time before its release.

If you’re a developer, you’ll want to find out more details on the BlackBerry 10.3 SDK Beta here.