heres the fact  i got for pc-fx,looks like the new gameboy ds is going to be even more powerful than pc-fx.
CPU:  
 32-Bit NEC V810 RISC Microprocessor running at 21.5MHz.
 
Color:  
 16,777,000 max. colors on screen from a palette of 16,777,000 colors.
 
Graphics CPU:  
 9 Parallax Scrolls
Cellophane
Fade
Rotation
Priority Effects
 
Resolution:  
 640x448.
 
Video:  
 NTSC standard output.
 
Built-in Compression:  
 JPEG with Run Length Compression-Full Screen/True Color Decompression at 30fps.
Kodak Photo CD Compatible.
 
Memory:  
 2MB of RAM
1.25MB of VRAM
1MB of ROM
256KB CD Buffer
32KB Back-up RAM
 
Sound Output:  
 16-Bit Stereo with 2 ADPCM Channels and 6 Sample channels at 44.1 kHz.
 
Format:  
 CD-ROM (2x Speed)
 
Release Date:  
 December 23, 1994 (Japan)
 
Dimensions:  
 132mm (width) x 267mm (depth) x 244mm (height)
 
Power Consumption:  
 16W
dreamcast:( just cause i love it)
CPU:  
 Hitachi SH-4
200MHz clock rate
360 MIPS (millions of instructions per second)
1.4 GigaFLOPS (floating-point operations per second)
128-bit 3D calculations
64-bit data bus
800+ MBytes/second bus bandwidth
 
Graphics Core:  
 NEC PowerVRSG
3 million polygons/second peak rendering rate
Perspective-Correct Texture Mapping
Point, Bilinear, Trilinear and Anisotropic Mip-map filtering
Gouraud shading 32-bit z-buffer
Colored light sourcing
Full scene anti-aliasing
Hardware-based Fog
Bump mapping
24-bit color
Hardware-based texture compression
Shadow and Light volumes
Super sampling
 
Memory:  
 16 MB main RAM
8 MB video RAM
2 MB sound RAM
 
Resolution:  
 640x448.
 
Colors:  
 16.7 million
 
Sound:  
 Yamaha Audio Core
32-bit RISC CPU
DSP for real-time effects
64 sound channels
Full 3D sound support
Hardware-based audio compression
 
Dreamcast Control Pad:  
 Digital and analog directional controls
Dual analog triggers
Virtual Memory System data save unit
 
Expansion Options:  
 Modem: 33.6kb per second transfer rate (56kb in U.S.)
Upgradable
 
Operating System:  
 Customized Microsoft Windows CE and Sega operating system
 
Media:  
 GD-ROM (GigaByte Disk-ROM) Drive - Maximum speed 12X
1.2 GigaByte capacity 
 
Console Dimensions:  
 7 7/16" X 7 11/16" X 3" , 190 mm (W) x 195 mm (H) x 78 mm (D)
Weight: 4.4 pounds, 2.0 kg 
 
Release Date:  
 November 20, 1998 (Japan), September 1999 (USA)