I would really like to see one 3rd party game that was a quality title, from an established successful franchise,not a spinoff, and had marketing on the level of a big budget HD game.
I think it is really surprising how few games that meet all those qualifications have been released on the market leader this generation, I think the Sonic titles may be the only ones that qualify. Although in Japan in 2009 there were a few in Monster Hunter, Tales of Graces, and Samurai Warrior 3. I think relative to expectations 2 of those titles were modest success and one a modest disappointment (Tales of Graces).
I can understand 3rd parties being hesitant about completely changing their strategy, but I think it is very reasonable to wonder why they haven't at least done all of those things for one title to find out. I think the Epic Mickey game will be the one to watch this year, as I expect it will have all of those things going for it.