While I agree that we are likely to see Pro have amuch larger share of total sales outside the very budget minded holiday shopping period I doubt very seriously it will account for 30% of total sales outside of the launch of a title like Horizion that has been heavily associated with and advertised for the Pro if it has some sort of bundle available. I could certainly see it being somehwere in the realm of 20-24% of total sales this month though. Still a sizable increase form the holiday season but accounting for the lower demand that normally accompanies such a larger price tag. That said the 50$ price bump the Slim received in January could skew the consumer value sufficiently back in the Pro's favor to see a larger share than would otherwise be present.
Has RE post 2 ever been a HW pushing franchise? I remember that RE4 for GameCube was touted as the third party exclusive that would dramatically boost GameCube sales but then ended up not really having much of an effect on sales at all only to then be ported to PS2 and sell far more copies there. I could see it pushing some particularly avid fans to pick up a PSVR for the real experience but I can't see that extending to PS4 hardware in general when it is also available day and date on PC.
About the Pro:Slim split I think it will depend a lot on the availability of the product first of all, if availability continues to be on/off they will lose sales.
I said 30% more like an upper limit, 25% is indeed more realistic.
About RE7 I don't know, hence why I'm curious to see if it's going to have any effect on hardware since it's clearly the biggest release of the month and the only title with a chance to move hardware this month.
I think it will depend on many factors, how successful the game will be in first place (if it sells poorly it won't boost anything clearly), being the first mainline title for the PS4/XB1 there might be fans of the series that still haven't bought a current gen console and now want to jump in (I personally have a couple of friends who did that this month but those sales won't be counted in the US lol ), the game has good Pro support so it might be a further incentive (on top of other titles) for people who have already considered to upgrade but were on the fence.
RE4 on the GC had no chance to change the fate of a console that was already a dead platform by the time the game was released (and already announced for the PS2 as well).
But as I said I don't know, the game might even be a disappointment in overall software sales, let alone being able to push hardware, so it's a test for the series and we'll find out when the results are released.