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Google unveiled the new Nexus 7 tablet and Nexus Q streaming media player Wednesday morning at the company鈥檚 annual I/O developer conference in San Francisco. The two devices seem like direct challenges to Amazon's Kindle Fire and the Apple TV.

Google revealed the long-anticipated $199 Nexus 7, which will start shipping mid-July, after a discussion of the refurbished Google Play, Android鈥檚 mecca of music, movies, books, magazines, apps, and games.

鈥淸The Nexus 7 is] optimized around all this great content available on Google Play,鈥� said Hugo Barra, Director of聽Google聽Product Management, while gripping the 7-inch tablet in one hand.

Google鈥檚 first tablet, co-developed by ASUS in Taiwan, runs on Android鈥檚 upcoming software, 4.1 Jelly Bean. The device boasts 1280 by 800 high-definition screen resolution, a quad-core processor, and a 12-core graphics-processing unit. Users can watch up to nine hours of HD video without recharging the device; otherwise, it survives on about 300 hours of standby time.聽

Designers have also included a 1.2 megapixel front-facing camera, an improvement over Amazon鈥檚 camera-less Kindle Fire.

Moreover, the Fire has a 1024 by 600 screen resolution and a battery recharge time of about four hours. And while the Nexus 7 weights 12 ounces, the Fire comes in at 14.6.

Google also revealed its competitor to the Apple TV, a 鈥渟ocial streaming media player鈥� dubbed the Nexus Q, also shipping mid-July. Shaped like a baseball and easily balanced in the palm of one鈥檚 hand, it works as a router for Android users to share music, movies, television shows, and more.

鈥淕oogle鈥檚 executives argue that this creates a more convivial environment than the earbud-encased experience that is increasingly the way that music is listened to in America,鈥� according to a New York Times blog.

The $299聽Nexus Q, or the 鈥渢hird wave of consumer electronics,鈥� as Google鈥檚 presentation video said, hooks up to a television or set of speakers. Through the media player鈥檚 Wi-Fi Ethernet capabilities, Android users can share their Google Play purchases, downloads, and favorite YouTube videos from the cloud, all in HD.

The $99 Apple TV also allows iOS users to stream HD videos, photos, and games, as well as music, through AirPlay. Where the Q differs is in its promotion of collaboration between Android users, who can add to and edit each other鈥檚 playlists.

Some say it鈥檚 unclear whether the Nexus聽Q can attract a significant number of paying customers considering its hefty price tag 鈥� not to mention, its reinvention of the individual music listening experience Apple has cultivated through the iPod and iPhone.

鈥淸The Q is] gamble that people are interested in making their home entertainment more social,鈥� says The New York Times.

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