From
http://pro.radeon.com/en-us/vega-frontier-edition/
"Today we’re
announcing the first of several Vega architecture-based products to roll out this summer, and soon we’ll be launching Radeon Instinct, Radeon Pro, and Radeon RX flavors of Vega"
AND
"The Radeon Vega Frontier Edition graphics card is going to empower the pioneers creating the next generation of gaming experiences, but it does beg one question: Can you game on a Radeon Vega Frontier Edition? The answer is yes, absolutely. But because this graphics card is optimized for professional use cases (and priced accordingly), if gaming is your primary reason for buying a GPU,
I’d suggest waiting just a little while longer for the lower-priced, gaming-optimized Radeon RX Vega graphics card. You’ll be glad you did.
None of that makes any sense unless the Vega RX is going to available after the Frontier Edition. We know they are rolling out during the summer, but exactly when that is is still up in the air.