There are so many new tools coming out, but here's the thing:

_You don't really need to abandon ship every time something shiny comes along._

Really, you don't. Use the tools that help you get the job done quickly and efficiently. I jumped ship from .NET (asp.net mvc) to Ruby on Rails because of three very distinct features:

1. Cheaper hosting.

2. A better baked-in ORM.

3. Ruby made me more productive.

It wasn't because some random guy in Germany wrote a blog post and called it the Next Coming of Christ - it was because I tried it out for a small project, and loved how it made my life easier. Less time in front of the computer, and more time with my family.

Just make sure you jump on the next big thing for the right reasons.