Here are the latest PS Vita gaming device direct competition with Nintendo 3DS.
Nintendo 3DS
OS: Nintendo Proprietary
Processor: Nintendo ARM
GPU: PICA 200
Screen Size: 3.53 inch top screen, 3.02 inch bottom resistive touch screen
Resolution: Top screen: 400 × 240 for each eye; bottom screen: 320 x 240
Motion Sensing: Accelerometer, gryoscope
Connectivity: Wi-Fi, local connectivity
Online Network: StreetPass for local play, SpotPass for over-the-internet
Camera: front and rear-facing cameras, 0.3 megapixels
File Compatibility: N/A
Backwards Compatibility: Nintendo DS, DSi
Battery life (in game only): 3 - 4 hours
Carrier: N/A
Price: $250
Release: April 2011
Playstation Vita
OS: Live Area, Sony proprietary
Processor: ARM Cortex-A9 (4-core)
GPU: 200 MHz SGX543MP4+
Screen Size: 5 inch OLED capacative touch screen, rear touch panel
Resolution: 960 x 544
Motion Sensing: Accelerometer, gyroscope
Connectivity: Wi-Fi, Bluetooth, 3G, GPS
Online Network: Near for local play, PlayStation Network for over-the-internet
Camera: Front and rear-facing cameras, 640x480
File Compatibility: Photo: JPEG, TIFF, BMP, GIF, PNG; Audio: MP3, AAC, WAV; Video: MP4, H.264
Backwards Compatibility: Certain PSP titles (unconfirmed)
Battery Life (in game time): 4 - 5 Hours
Carrier: AT&T
Price: $250 Wi-Fi, $300 Wi-Fi + 3G
Release: Q4 2011