Arcade boards have been mid range PC's since the mid 00's. The only reason why for example VF5 looked state of the art was because of Sega's talented developers rather than hardware. The reason games are arcade exclsuives, is not because of powerful arcade hardware, but because venues simply need exclusivity.
I'm absolutely for Joypolis and Orbi in the West.
Lindbergh, the Hardware that ran VF5, had a similar GPU to PS3. But its Microprocessor(Pentium 4 Cedar Hills) was twice its speed and slightly more powerful than 4 Cell & better performing.
Taito and BandaiNamco boards(All non Sega boards) have been low end powered since 2006. The most high end performing one"Type X2" is a bit ahead of Wii U.
Ringedge 2 & Nu (Clarkdale & Ivy Bridge powered)have much better CPU power and performance than AMD Jaguar.
Regarding Joypolis, SEGA just opened its first overseas one in Shanghai this summer. Perhaps more investors may help SEGA Live Creation to bring it Stateside. That would Rock!