I couldn't quite put my finger on the building you can see through the window. I managed to find an address for the cafe (48 High Street) and it clicked after I opened up streetview. It's the corner office block next to the mini roundabout on the High Street: https://www.google.com/maps/@51.4075868,-0.3077591,3a,75y,96...

If you spin around in Streetview you can see the building that must have house Cyberia itself to the left of what is now Fillies Kingston. You can also cycle back in time to the earliest Streetview shots in 2008, at which time the cafe must already have closed down, and is next to a place called Bar Elvissa.

In case you're interested, my Googling also resulted in this brief conversation on Mastodon between other apparent previous frequenters of Cyberia Kingston: https://mastodon.social/@ade/109405408248074169