That is silly. Size of games doesn't matter at home. You aren't moving them or traveling the them...so you shouldn't lose them. I am not convinced that people want cards though, because disks are cheaper. However, I must say I like the idea, that a card could have the ability to save game files on the card, so you can take your save with you to your friends house...that is an important missing part in the disk game era.
I do not think 3rd party support is dead, just ignorant. They treat Nintendo differently, because they got their tainted glasses. They haven't seen Nintendo growing or expanding for years...they assume Nintendo can only be kiddie, casual, non-gamer. They see what sells initially on the system and copy it...instead of being original. When they are original, they don't market it, advertise it, or push it at all...and then it sells bad, and they say Oops. Nintendo can't sell traditional games. Some companies understand that is not true. Some companies understand it first must be a quality product they believe in...then advertise it...but unfortunately not enough do.
There will be good Wii games that come out...and developers that take the time to make great Wii games can be rewarded greatly. That said, Nintendo did not do a good job enticing 3rd party developers to make games for their system. The online structure, power, and controller were hard to get around.