As discussed on IRC, it looks like they changed the layout for the Persona 5 announcement page. Could be nothing though.
http://p-ch.jp/sp/
I'm surprised this thing is still up if you ask me. That and unless some of the other things change like the removal of the date at the bottom into another date, I wouldn't think too hard about it.
Install base isn't relevant to games that sell the kind of numbers Yakuza does.
There are plenty of PS4s out there for a game that 'a only going to do 20 k retail, if that, and the audience is somewhat starved, so you'd get done extra sales off the basis of that, too.
Inorigo, it's pretty much a two way street with this. You can get sales from people who want games on system since it's so early into the console's life and are wanting games to play, but you may not get that many of sales because of how niche the game is, and Yakuza is really niche if you ask me. And it's also pretty much a financial risk, because you may or may not get your money back on the investment into developing the game, especially this early in the console's life.
If that's true, my opinion about Sega buying Atlus goes from "tragedy" to "BEST THING EVER", just like that.
And I'm sure they won't dub it. They know the fanbase is used to undubed game, and it's cheaper that way.
I think a dub could work, but would have to go into approaching it differently compared to their other projects. But yeah if do localize it, it will most likely be subbed, because it will most likely be cheaper to do.