Static URLs vs Dynamic URLs - What is the Future?

Rewriting URLs to Static Urls = better serch engine results?

[sandyk20]

What are your thoughts about this?

I had been testing static and dynamic URLs over a period of last few months on few domains (each domain registered atleast 1+ years back).

Domain A - Using Dynamic URLs
[widgets.com...]

Domain B, C, D and E - Using Static URLs
Domain B = www.xyz.com/product-categoryid-1-productid-10.htm
Domain C = [widgets.com...]
Domain D = [widgets.com...]
Domain E = [widgets.com...]

Results show a varied difference among each other.
1. Dynamic URLs are burried much deeper in search results.
2. Keyword/title rich URLs show (Domain D and Domain E) appear on top of search results.
3. Static URLs get very fast indexing comparatively with SERPs.

What shall be the future?
Will engines break this trend in near future as an over-increasing spam all over the internet to-get-keywords-listed-in-url?
What are your comments/ideas and opinions on same?

[freewebsiteideas]

It's not spam to have one or two keywords in the url.

[perfectcoding]

I'm not sure what I can and can't link to, so I won't try: go to your favourite search engine and look for "Cool URIs Don't Change".

Not only do good URIs help with SEO, they're also user-friendly, and future-proof.

In theory.

You have to implement it correctly, of course, and that's the hard part.