it all depends on how its marketed. N-Gage was marketed originally as a game deck and shouldn't have been. Yes it plays games, but it should've been marketing as a mobile gaming phone, which it is now, but a little to late. So because it was marketed originally as a game deck, people were disappointed with the screen size and the quality of the games, although not bad, but not as good as a game system. I remember when the N-gage first came out, i played it as being like a GBA, granted, Tomb Raider sucks on the N-gage, i blew it off completely, now 2 years later i own one and love it because its the perfect mobile gaming device for me.
As long as people keep in mind that this is a phone, it should do well.