Hatsune Miku: Project Diva Dreamy Theater 2nd is an interesting piece of work. The PlayStation 3 app, developed by Sega, allows you to play Hatsune Miku: Project Diva 2nd in high-definition on your PS3, provided you own the original PSP game.
Sega released a similar app for the original Hatsune Miku: Project Diva back in June of this year as well. Dreamy Theater 2nd is due for release in Summer 2011. Here are some quick comparison screens:
Project Diva 2nd: Dreamy Theater 2nd: