The metrics aren't as good as we were hoping for, but we do have to stress that what feels laggy for one person could feel absolutely fine for another - what we've attempted to do here is to back our observations with hard numbers using proven methodology. The experience will change from game to game too: the lower the input lag on the title, the better the Remote Play experience is likely to be. Call of Duty prides itself on its low latency controls and the game felt OK when we played it via Vita, but Resogun just felt wrong in all of our testing across multiple connections, PS4s, Vitas and routers. On the flipside, Assassin's Creed 4 is generally quite latency tolerant anyway, and that worked fine for the most part, though once you see the lag, it's really difficult to "unsee". Rarely has the phrase "your mileage may vary" felt so apt.
Perhaps - like the mooted Nvidia Shield enhancements - we'll see significant improvements to the functionality over time. However, in the here and now, Vita Remote Play is a cute function that's useful for some games but not for others - and right now we definitely see it as a cool value-added extra rather than the saviour of Sony's brilliant - but beleaguered - handheld.