Among the improvements,  it's the very first console with a built in modem.  This would of course not only mean internet access, but also networked gaming.  An interesting addition is the OS.  It will be a customized Mictosoft windows OS.  This could also mean ports to and from the computer would be very easy..........easier ports mean less time needed for coding, less time means lower prices.
 

Dreamscape specs:

        -2nd Generation Power VR (by NEC/Videologic)
        -sound:  32-bit RISC CPU (64-channel ADPCM)
        -16MB (64-megabit SD-RAM x 2)
        -V34 modem (33.6 Kbps.),  V42 and MNP5 full support
        -customizable Microsoft Windows CE OS.
        -CD-ROM:  12x
        -2kg
        -16.77 million colors
        -Graphics capabilities:      Bump Mapping
                                                Fog
                                                Alpha-Blending
                                                MIP-Mapping
                                                Trilinear Filtering
                                                Anti-Aliasing
                                                Environment Mapping
                                                Specular Effects