This will be really big for casinos. Truly huge for them and SEGA.
Arcades outside Japan will be able to get more Japanese games without the need to import expensive machines. This will increase their profits and lower their expenses. It may help prop up the struggling arcades gaming market in Japan.
But more than anything this will be huge for casinos, which is where SEGA started so it's apt that they've done this for their 60th.
Sure, but it will also mean old and dirty machines. Also most of them will look the same. The machine itself is a work of art, but with this most of them will probably just be single color machines to make sure they fit different games.