The reason behind making it difficult for an app to take a screenshot is security.  Imagine if an app writer was able to take a screenshot in the background and send it to themselves while say, you were logging into your banking app or website?  It isn't that it can't do it, its that the developers disallow it.  The security hole that was open when we first got our One's that allowed us to have shoot-me work without root initially, is the same hole that was used to gain root.  Think about it...

I really hate that you have to use the sdk.  I am by no means the most tech savvy person but this is what i did. 
Download sdk and extract to new folder
run the setup and get a fail
force setup
go to tools, ddms
now when it show's devices, nothing, blank
I have debugging on and checked my drivers all fine but still wont be seen?

Any ideas?

No. Every time i connect to computer the only things i check is debugging and disc drive
When i run the sdk setup i have a list of about 15 installed packs but when i go to Virtual devices nothing shows up.

From their if i go back to tools, ddms i get a quick flash of a screen and then nothing again.
Oh yea i have Vista too dont know if that matters

What apps are there for screen capture?

Can Android do this out of the box?

Thanks

Well, you're right and wrong there Z.      You can do it with the ddms from the Android SDK, but it does not require rooting your phone.  I've done it plenty times with my Hero and works like a charm.