Resident Evil 4-6 are really completely different beasts to those that came before them. With a bigger focus on action, 4 in particular has become a bit of a classic.
Well. you'll be able to play them all on both the PlayStation 4 and Xbox One soon, as they are all getting updated. They will be released staggeredly though, with Resident Evil 6 coming next month, Resident Evil 5 coming in the Summer and Resident Evil 4 in the fall. They will all be $19.99 each.
While Resident Evil 4 has been out on a ton of platforms, if you've still never played it, I'd definitely suggest giving it a go when it comes around. Here is a trailer to get you jazzed: