When it was first announced alongside the PlayStation Portable, Gran Turismo 4 Mobile was a statement of intent. PSP, the videos argued, would be the only handheld for which you could buy games that look and feel like the ones you buy for the home.
The intervening five years, however, which have also seen the game renamed Gran Turismo, have softened its impact considerably. It's tempting to begin by pointing out that while it does look and feel like a racing game you might buy for the home, that also assumes you're referring to the home of 2004.