Space Channel 5 isn't the only game I'd play on a portable Dreamcast; I'd also play ChuChu Rocket!, Jet Grind Radio and Shenmue, among others.
Of course, that would require both the existence and purchase of such a system.
Surprisingly, the former point of contention is about to be taken care of thanks to ... some company that isn't Sega. Said company's portable Dreamcast (below) will be sold via pachimon.tv beginning next month. The system's price tag: ¥38,000 (about $470).
As much as I'd love to play Space Channel 5 and ChuChu Rocket! during my next flight or road trip, I think I'll hang on to my hard-earned money and play games on my DS instead.