Just some rough translation, more on 4gamer
On PlayStation VR:
-"Prices and release date will be announced when it is time."
On 4K Blu-ray/Ultra HD Blu-ray:
-"Current PS4 doesn't support Ultra HD Blu-ray."
-"Support is still under consideration."
On PS4 Performance Boost:
-"Can't talk about the specific content."
-"Thinks performance boost might requires a lot of timing when using something better than x86 architecture."
-"So in other words, it is possible."
-"For example, there are ideas such as releasing a standard PS4 and a high performance PS4."
On PS Vita:
-"No first party titles in development for PS Vita currently."
-"Will leave third party devs to do their best."
-"SCE main focus will be on the PS4."