When Sony released their 4.50 firmware, one of the updates was the ability to transfer data between the PS Vita and PS3 using Wi-Fi and Ethernet, this confused some people, so they have released a statement regarding that, here it is:
We have mistakenly announced in our PS3 system software update 4.50 blog post one feature that is currently unavailable, “Data can be transferred from PS3 to PC Vita using Wi-Fi and ethernet connection.”
This feature will become available when the latest system software update for the PS Vita system, currently under development, becomes available.The system software update timing is yet to be decided but we will announce when it is ready.
It also says that the data can be transferred via ethernet connection which is not supported on the PS Vita system. This is referring to the PS Vita TV system which will become available in Japan later this year and in Asia in January 2014.
We apologize for the confusion and appreciate your understanding.