AMD will be showing the Radeon RX Vega in a bit of a road-trip. This information was posted at the AMD website, they'll take and show in Budapest, Hungary, then PDXLAN in Portland, USA and the final stop is SIGGRAPH 2017 in Los Angeles, USA where it will be unveiled to all.

Here's what AMDs Annie Lee writes about it:

Radeon RX Vega is on its way—but before that, we’re bringing it to you. We’re making a few stops to show it off in action: we’re packing up a few Radeon RX Vega GPUs and embarking on a mini community tour. At our stops, we’re setting up a Radeon RX Vega Experience area where you’ll be able to game on the upcoming graphics card and take in the experience, tradeshow-style. The main reason for this tour is to host a meet-up: for all of us PC gamers to get together, play some games, chat and hang out. Just bring yourselves and your friends.

Radeon RX Vega at Akvárium Klub in Budapest, Hungary
Our first stop is Europe. We want to meet up with our fans in Budapest, Hungary, so we’ll be popping by on Tuesday, July 18 at the Akvárium Klub from 2 to 7 CET. If you’re in Hungary, mark your calendars and meet up with us!

Radeon RX Vega at PDXLAN in Portland, USA
After Budapest, we’re headed to PDXLAN in Portland, USA from July 21 to 23. We’ll be setting up a Radeon RX Vega area, mingling with all the gamers attending PDXLAN. If you’re participating at PDXLAN, take a break with some Radeon gaming. Watch our social media channels for our location!

Finally, During SIGGRAPH 2017 in Los Angeles, USA
We know you’ve been waiting for Radeon RX Vega and we can’t wait to unveil it to you all. Details on the Radeon RX Vega are coming during SIGGRAPH 2017, so you’ll want to pay attention to what’s happening during this technology summit taking place in the last week of July.