With the launch of the new BlackBerry 10.1 SDK we are seeing more signs of what is coming on the BlackBerry Q10. One of the things I really like is the smaller action bar on the bottom of the screen. You can already see this smaller bar on the Z10 browser where it is smaller than anywhere else. This is also coming to the Q10 but it will be everywhere. Essentially imagine the action bar without text as you see above. BlackBerry also goes on to explain the different Bright theme for the Z10 with its LED display and the darker battery saving Dark theme for the Q10 with its OLED display.
Here is how they describe it:
By default, devices with LCD and OLED screens use different visual styles (also called themes) for the controls in Cascades apps. Devices with LED screens (such as the BlackBerry Z10 smartphone) use a bright theme, while devices with OLED screens (such as the BlackBerry Q10 smartphone) use a dark theme. Certain core controls (such as labels, buttons, sliders, and so on), as well as the default app background, appear differently depending on the theme. The dark theme was chosen as the default theme for OLED screens because this type of screen consumes more power when displaying brighter images. In addition, brighter images can cause a burn-in effect on OLED screens, where pixels lose their luminosity and color properties over time.

BlackBerry also highlights how they are trying to get developers to setup their own custom keyboard shortcuts in their apps. Best of all BlackBerry is trying to school developers to use the same concepts for keyboard shortcuts as the native keyboard shortcuts that are coming on the Q10. Check out the details here.

Diego Nei, MBA, PMP ( View Profile) - Posts: 267
Posted: March 22, 2013 at 3:09 PM EST
I want Dark/Bright for my Z10…
Amir Saad ( View Profile) - Posts: 512
Posted: March 22, 2013 at 6:30 PM EST from my BlackBerry 9810 | OS 7.1.0.694
Yeah now that makes sense, the burn in effect and more power consumption in bright screens is what I read on Wikipedia which seemed a bit odd since it was never mentioned. The brighter screen on the OLED by the way uses a lot more power than the darker theme saves…bigger battery!!!
RICO Not Registered
Posted: March 23, 2013 at 2:19 PM EST from my BlackBerry PlayBook | OS 2.1.0
I’m still highly disappointed with the small screen! Not impressed at all.
Harkunwar Singn Kochar Not Registered
Posted: March 23, 2013 at 3:44 PM EST
I like BlackBerry for their qwerty keyboards so I like the Q10 more than Z10
smokey-la ( View Profile) - Posts: 40
Posted: March 24, 2013 at 11:47 AM EST from my BlackBerry 9900 | OS 7.1.0.825
I second that right there.
Steve ( View Profile) - Posts: 686
Posted: March 24, 2013 at 1:05 PM EST
As much as I love my physical keyboard I am impressed with what the PB keyboard can do so I am trying the Z. The other reason, obviously, is I don’t want to wait any longer. My 9700 is ready for retirement .
dpr ( View Profile) - Posts: 767
Posted: March 24, 2013 at 3:44 PM EST from my BlackBerry PlayBook | OS 2.1.0
Blackberry should let you choose between light and dark themes.
gordon40 ( View Profile) - Posts: 5
Posted: March 26, 2013 at 10:22 PM EST
do the keyboard shortcuts still exist for opening apps on the home screen? like L=calendar, N=BBM, D=memo pad……etc, those shortcuts are important to me