The event recently concluded and you can see the concert on NND (or on youtube which will eventually happen because the internet)
You can also look around the
#超パ2018 hashtag on twitter for screenshots from the concert
It should also be noted that Mirai Akari performed her cover of Echo during the vtuber portion of the event too (
link)
Edit: somebody posted a quick summary of the vocaloid part on twitter
I have no idea how long this concert will stay up on
YT and
BiliBili for until it gets yanked.