As I already mentioned, when using the keyboard in vertical mode, my small hands had difficulty maneuvering around the keyboard--my thumbs couldn't stretch across the whole device to reach the keys. Horizontal mode felt much more natural, but as a touch-typist, I still made more errors than I would with a physical keyboard. More critically, while I've gotten fairly speedy with tapping away on my iPhone 3GS' keyboard, I didn't feel anything near the same speed or affinity for the touch keyboard on iPad during my initial hands-on--something I attribute to the physical expanse of the device, and how my fingers aligned with it relative to the keyboard. To type, I needed to put the device flat on a surface, not a particularly comfortable experience. (Apple will soon have a $69 keyboard dock accessory.)
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According to what was known as of the launch event, the iPad runs iPhone OS 3.2 (which has not been released for actual iPhones yet). While the friendly, easy-to-use, interface gives the iPad an immediate built-in audience, the lack of a freshened design for the iPad feels like a let-down considering how long the iPad has been in development. There might be some as-yet unknown incremental differences between versions 3.1 and 3.2, but on the surface, the iPad's interface looked exactly like a blown-up version of my iPhone 3GS'.
In my hands-on before the iPad shipped, the OS didn't translate very well from the much smaller iPhone to the iPad. It's not so much about the touch aspect of the interface; in fact, navigating by touch is a huge benefit on the large screen, and superior experience to, say, the joystick-based navigation of the comparably sized, non-touch Amazon Kindle DX screen. But images, icons, and text weren't as crisp as I'd expected on the early model at the launch event's pre-production model. At times, I found the experience much like watching standard definition video on an HDTV, in that some aspects of the operating system's visuals didn't appear optimized for the iPad's display. I'll update this review after seeing the shipping product later this week.
On the whole, Apple has done a good job of optimizing its built-in core apps for the iPad's large screen.
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As a photo viewer, the iPad shines. Photos looked superb on the iPad's display, and it uses all of the familiar multitouch gestures (flick, pinch to zoom) found on the iPhone's photo app. The iPad's ample screen showcase images well, and it permits you to preview many more images, more easily than on the smaller iPhone.
The iPad's photo application is much better than the iPhone's, too, with on-the-fly slideshow creation (complete with transitions)
Another convenience:
The e-mail app has been redesigned to take advantage of the spacious screen, too. For example, when in landscape mode, the e-mail app shows recent messages and a search bar at the left, and displays the selected message at the right--an approach that's not viable on the iPhone's smaller screen.
The Calendar app benefits greatly from the iPad's display. Now, calendar entries are more readable, and the day and weekly views in particular look terrific. For example, in the weekly view, a drop-down menu makes it simple to switch among different calendars for your household.
The reimagined, highly visual iPod library looks very different on the iPad. In landscape view, you can easily see video-playback chapters, or view info about the video while previewing it in a pane at right. hows how video-playback chapters look in the Video player.



