With its slim design, fantastic screen, and oodles of power, the Samsung Galaxy Tab S 8.4 is a superb smaller tablet, and a worthy competitor to the ever-popular iPad Mini.
The upgrade is free for Windows 8 users, but others now can place orders for the the new operating system, which will ship in less than three weeks.
Windows 8.1 is out on 18 October, and it's available to order now if you're in the US.
The free update will kick off in New Zealand. Microsoft has been tinkering away at Windows 8.1 since its June unveiling, so even users of the preview edition will find a few surprises.
Lens announcements are not normally a reason to get excited, but this model from Sigma should change that.
The next version of Apple's mobile operating system will be out on 18 September, the company has confirmed.
Although the Sony Xperia M2 looks pretty slick, it's let down by its low resolution display and its old version of Android, which makes even its affordable price way too high. For much less money, you could snap up the Moto G or spend a little more and pick up the older Xperia Z with its full HD display and waterproof design.
Check out our video review of the Sony Xperia M2. It's an affordable Android phone with a 4.8-inch display, quad-core processor and 8-megapixel camera.
Piper Jaffray analyst Gene Munster, based on sales and upgrade data, thinks that nearly 19 million customers with the iPhone 3GS will upgrade to the iPhone 4S this year.
The Samsung Galaxy Tab 4 is a smooth-performing midrange slate, but it's overpriced compared to similar tablets.