<< HOWEVER, as we cannot *PLAY WITH* the systems right now >>
Your right, we can't play any X-Box games right now - there are none.
However there are plently of Dreamcast and Playstation 2 games to play, and with Nintendo and its second parties behind the Game Cube, you know exactly what games there will be.
We know barley a thing about the X-Box's games. Sure Japanese developers have signed on, but who knows if they will even make a game for it. Alot of companies own development kits for consoles they wont use (for example, Square has N64 dev kits), so just because they have them doesnt mean they will use them.
Also, the X-Box will have no "money" game, no system seller. Sega had NFL2K, Sonic, Soul Calibur and all the other Sega franchises, Sony has Square, Konami, Namco and EA, and Nintendo has all of its huge franchises. The X-Box has none. Other than Microsoft's own game division (which is little known outside of the PC gaming crowd) they dont have a "killer" game for their console. It wont garner much attention without a big, popular title launching with it.
So, like I said, it doesnt matter if you have the best hardware, you need to have key software there first. The Dreamcast proves my point perfectly.