One needs to be aware that old ("classic", or "last gen" if you will)
rhythm games will be highly problematic running on a HDTV setup.
This is mainly due to the obscene amounts of post-processing and image enhancing trickery these modern displays are going to apply to a low-res video input such as a non-HD video game system. Even using "gaming modes" and other input-lag reducing settings, there will be a significant input lag detrimental to a "original" and "classic" feel of the rhythm game in question - in extreme cases to a point of the game feeling
unplayable.