Allow me to clarify. You see, when Atari built the video game industry, they were challenged by the Intellivision and the Commodore64. Was that copying? To an extent. When Nintendo's NES came out, were they copying? Maybe a little, but they built upon the technology of the Atari to make something better. When the SEGA Genesis came out, Nintendo answered with the SNES. The Saturn and the Playstation brought about the Nintendo 64. The Playstation 2 brought the Dreamcast, the Gamecube, and the Xbox.
How is this the same? It's competition in an industry, in this case video games, that forced the market to evolve. If Tamagotchis monopolized, you'd have the same technology in your Tamagotchi for many years. Lack of competition makes companies not update as often as with competition.
So, you can look forward to a better Tamagotchi coming out. Just like how fans of video games and look forward to the Xbox 360, which is out, the PS3, and the Wii. Competition brings about the evolution of a market. Without that evolution, that market is doomed to fail eventually.