I have yet to find a single case of person who had ps3 or x360 and sold it to buy wii. So no Wii is not going to be replacement to any of the HD machines.
And i don't agree about Wii being machine of choice for niche genres -
for jRPG - maybe but i don't forsee lack of high budget releases like WKC, SO4 or FF on x360/ps3
Point&Click - nothing even comes close to PC (and mentioned Broken Sword is 12 year old PC game port/remake)
arcade shooters - those are perfectly fine as XBL or PSN releases and let's face it most people won't be paying $60 to play this genre.
platforms - was there ever a time when Nintendo wasn't a king of platformers ? Still it's not like HD world doesn't have briliant games in this genre like LBP, Braid or remakes of old games like Bionic Commando reamed plus average titles like Sonic, Spyro etc.
Puzzles - those are best suited to portable machines anyway not to mention there's enough of them on Live/PSN to keep not puzzle only players on the sony/ms platform.
However Wii might become good choice as second gaming machine to people who like jrpg/platformers. Which also can be used by girlfriends and drunk friends :D
PROUD MEMBER OF THE PSP RPG FAN CLUB
