
This year, it’s all about the screen. The third-generation iPad has lots of other improvements but it’s the brilliance of the display which leaps out at you as soon as you wake the screen.
Apple has come in for some criticism that the new iPad doesn't offer as many new features as some had hoped. But, with the new screen and improved GPU the battery has also had to be improved and its capacity increased – it's nearly twice as capacious as the one in the iPad 2. With all that, it's not a huge surprise that there aren't a raft of new features.
Jaw-dropping screen
As you may know, it has four times as many pixels as last year’s iPad 2, which wasn’t exactly a slouch in the display department. The 3.1 million pixels give a resolution of 264 pixels per inch, which is enough to make picking out the individual dots completely impossible.

The new screen also has greater colour saturation – an increase of 44 per cent, according to Apple – which lifts the vividness of the screen. And it does this without becoming over-saturated or garish.
This is a great technical achievement: to squeeze in this many pixels could easily have resulted in image noise, crosstalk or any number of visual artefacts, but Apple has pulled it off. Not once have we seen the display look blurry or anything less than stable and pin-sharp. According to Apple, that’s because the pixels have been distanced from the signal which tells them when to turn on and off or how brightly to burn. However it’s been achieved, it works flawlessly.

There’s more to say about the 2012 iPad than just the new display, but in passing, let’s note that this is an expensive component. It’s hard to believe that rival tablet-makers will be able to match, let alone undercut, Apple’s prices.
Developers are gearing-up for high resolution
Enhanced graphics in iPad games will arrive quickly as app developers update their programs to match the high-resolution screen, though until then, they’re upscaled nicely.
Improved camera
The camera on the new iPad is a big improvement over last year’s iPad 2, where the resolution of the video-optimised camera was less than 1 megapixel. Although the new model is 5MP, not the 8MP you’ll find on the iPhone 4S, it’s pretty good. Not least because of the lens structure, the f/2.4 aperture and the backside illuminated sensor - it sounds vulgar, but it just means the camera’s wiring isn’t in the way of the sensor.
Dictation is here, but no Siri
There’s no Siri on the new iPad – which is a shame – though arguably the best part of it is here: dictation. With Siri, if you’re dictating a text message and Siri mishears a word, you have to start dictating again from the beginning. With dictation, things are much better. As with the iPhone 4S, if you have an internet connection, every keyboard that appears has a microphone key. Touch it to launch dictation and the software will listen and transcribe, including punctuation marks.
4G, just not in the UK
Dictation is just one application that needs a decent data speed to work well. The new iPad has the capability to handle up to 42Mbps - though the masts that offer these speeds are far from ubiquitous. And though the box says “Wi-Fi and 4G”, you’ll get 4G LTE speeds only in the US, not the UK, even when 4G LTE arrives.Not perfect, but not far off
The iPad still isn’t perfect. If we really can’t have 4G, at least an indication when you’re connected to the fastest speeds (HSPA+ etc) instead of plain 3G would be good. After all, the iPad is set up to say when you're on plain old GPRS or EDGE.It would also be good if there were better connectivity: not more slots, but a more effective USB adaptor so it’s easier to take photos off the tablet when there’s no data connection, for instance. And we'd like it if, among all the localisation that is embedded, a UK iPad knew we spell “Favourites” with a u in it.

via: http://www.pocket-lint.com/review/5778/apple-ipad-3rd-generation-review