On the eve of Halloween 31 October 2008 satoshi wrote
"I have been working on a electronic cash system that's fully peer- to -peer ,with no trusted third party."
Can we say that his work has been done or is still a work in progress .
His work on his end should be considered done. Less he knew the system he proposed will be commercialized in a negative way.
" What has been the development of Bitcoin and improvement since that statement was made till now?
And will Bitcoin (satoshi dream or goal ) be fully accepted in the world as a means of payment?.
You can follow that yourself on the GitHub repo and maybe look at the release notes for each release?
https://github.com/bitcoin/bitcoinTo answer the last part, don't know where you read it was Satoshi's dream to let bitcoin become the primary currency of the world. As of now, is bitcoin accept as a mode of payment? Yes!