It seems many games for the XBOX 360 are meant for HDTV. I was playing Cloning Clyde the other day and when the instruction text popped up i couldn't read it. I had to walk over to the tv to actually read it. I guess it's better on a HD enabled tv, but most people still have an ordinary one. Oblivion is better but still hard to read at times.
I wish developers could show some consideration and test the games on normal tvs. Maybe they could have an option to scale up the in game text.