Here's what I believe.
RE4 is a defining game of our time. It's vastly better than most of these other so-called AAA rehashes we are forced to deepthroat everytime one of them struggles its way out of its financially induced overlong graphics-based development process.
RE4: Wii edition is a cashin port of that great game.
However, it is notable for bringing to the table a nice and easy method for dealing with clunky analog aiming found in all console shooters. Because the game intends for you to PAUSE then AIM, it is simple enough to take advantage of the inaccurate IR pointing device found on the Wii.
RE5, unjustly, is only being released on HD consoles, and Wii owners seem to want to use this slight downgrade to the control scheme as an excuse to up-play the Wii control, which are in theory, custom fitted to the game. Ironically, however, a large complaint about the Wii port is the IR controls actually made the game a tad too easy, and therefore, less suspenseful.
Unfortunately for FishyJoe, and the rest of you, you are overplaying your hand a bit here. The disparity between the control schemes exists, certainly, but it isn't a significant issue for most gamers, and it's obvious that this conversation is really about greatness of the Wii controls, and not about the series as a whole. RE:Wii was the Killzone 2 of the Wii. It proved, finally, that Wii controls/PS3 graphics, could be better than the competition given the right circumstances.
That said, RE4 was a fantastic, real AAA game, with or without IR, and one reason was its cutting edge graphics which RE5 would be forced to ignore were the game to appear on the Wii.
Resident Evil is Capcom's baby. They cherish no other series like it, and so we have been treated to a plethora of excellent main games, and possibly the best spinoff ever, Code Veronica. RE5 fans should just ignore most of the complaints of the mainstream whom before RE4, could have cared less about the series, and realize that Capcom has yet to let them down. The game will at least be good.
So, without too much more posturing, I'll slip into obscurity by saying: Leon is Jack Bauer on crack, and if you think Killzone 2 is as good as RE4, eat your gun.