Release a few teaser screenies of what can be done with Revolution. Give something for people to drool over. Best way to do this is show a few screenies of the Revolution Zelda game and Mario game. Make the Mario game more "traditional" (or Mario 64'ish

) and tell people these are renders of what is capable but since its technology still in the works so they may be unable to have everything available to show right there.
Use those screens as fodder until E3 then unveil the big guns to the world. Unfortunately I doubt it would be playable at that point if the technology isnt all there yet but if you can show off some great videos of whats to come. Announce what games are in the works to get people salivating.
Don't overhype the console but show off its strengths. Don't make it sound like the second coming of Jesus but tell the world whats to come and what will make you consider it.
Show off some new games also for the next console. Keep the games that are always fun to play but make some new launch titles also.
For colors and the look, make it more pleasing for everyone. The big issue with the Gamecube is people go "OMG, Its a purple purse, ewwww" and don't buy it.
Every company will hype their console but there is such a thing as overhyping (*cough Halo2 *cough* (sorry, had to

)