It's good for a car or a really small room, but why in the world would you use this as a portable? If Gamegear and Nomad seemed huge to you, how can this be any smaller? And if that's the picture, how can it be a portable with no on console buttons, you can't play it easily on a bus or a train, not even an airplane unless you rest it on your tray and hope you have enough room for your dpad.
As much as I love Dreamcast, this is kind of stupid. If it was a PS2 and could play DVD's though, then we're talking, as a portable DVD player/game console, it's worth carrying around, since portable DVD players aren't much better than the PS2 as a player and not much bigger than this "TREAMCAST'