The 7-inch tablet space is suddenly looking very crowded with Google's Nexus 7 set to launch in the coming weeks and rumors of an "iPad mini" heating up, and it sounds like Amazon is moving to keep its own tablet competitive. AllThingsD reports today that the retailer is prepping the Kindle Fire's successor for a Q3 launch, citing "sources familiar with Amazon's plans." Few rumored specifications are available, but the new tablet is said to have an improved screen that comes in at 1280 x 800 (WXGA) — the same as the Nexus 7. Other than the resolution bump from the Fire's current 1024 x 600 display, the screen ditches the old model's aspect ratio. Of course, the new tablet is said to be both thinner and lighter, too. The Kindle Fire successor is set to be revealed in the second half of this year according to the report — a date that lines up with the previously-rumored July 31st unveil.