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http://code.google.com/android/c2dm/

http://android.google.org.cn/posts/android-cloud-to-device-messaging.html

Introduction

Since 1995, Gartner has used hype cycles to characterize the over-enthusiasm or “hype” and subsequent disappointment that typically happens with the introduction of new technologies.^[2] Hype cycles also show how and when technologies move beyond the hype, offer practical benefits and become widely accepted. According to Gartner, hype cycles aim to separate the hype from the reality, and enable CIOs and CEOs to decide whether or not a particular technology is ready for adoption. A longer-term historical perspective on such cycles can be found in the research of the economist Carlota Perez.

Five phases

A hype cycle in Gartner’s interpretation comprises five phases:

1. “Technology Trigger” — The first phase of a hype cycle is the “technology trigger” or breakthrough, product launch or other event that generates significant press and interest.
2. “Peak of Inflated Expectations” — In the next phase, a frenzy of publicity typically generates over-enthusiasm and unrealistic expectations. There may be some successful applications of a technology, but there are typically more failures.
3. “Trough of Disillusionment” — Technologies enter the “trough of disillusionment” because they fail to meet expectations and quickly become unfashionable. Consequently, the press usually abandons the topic and the technology.
4. “Slope of Enlightenment” — Although the press may have stopped covering the technology, some businesses continue through the “slope of enlightenment” and experiment to understand the benefits and practical application of the technology.
5. “Plateau of Productivity” — A technology reaches the “plateau of productivity” as the benefits of it become widely demonstrated and accepted. The technology becomes increasingly stable and evolves in second and third generations. The final height of the plateau varies according to whether the technology is broadly applicable or benefits only a niche market.

The term is now used more broadly in the marketing of new technologies.

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