The 2 other colored screen pets don't seem to take up more battery so I'm not sure if battery life will be a big issue. If it's a lit screen then yes, that will be an issue.
The biggest issue with the color tamagotchi right now is price. I have heard it's marked at around 50000 yen which is $50is here. I'm not sure people will want to pay so much for it. At that price, it might be hard to find as retailers might not want to stock it. It may end up being Japan only release if they do test marketing for the Western market and the test groups say.. no way!
But we shall have to see what the final retail price really turns out to be.
I'd be definately willing to shell out 50 bucks for one. It stinks that there isn't a market for alot of the 'Japan Only' releases. Japan gets some really cool stuff.
And about the other color screen pets, which other one is there? And is the Miuchiz any good? I've been seeing them in bargin bins wherever I go and I'm truly tempted but the few snippits I see online say it's very buggy and not really worthwhile.