I have to say, I really do think that Bandais last chance to make Tamagotchis popular again is with a colour screen... children LOVE vibrant, colourful screens. The love cute characters, and the characters simply can not be that cute with a B/W screen because the pixel count is way to low. There's probably just as many pixels on one colour screen Tamas characters than there is on a whole screen on a B/W. Children won't like that.
My friends children have all seen my +colors and my Connections and Vintages, guess which they like the best?
They also need to seriously revamp their advertising campaign, the Tama Go had absolutely abysmal advertising that made you wince just watching it. The characters were poorly animated, the dialog was cheesy and the whole thing screamed 'cheap'.