Call of Duty Classic may not re-invent the wheel, but it's not supposed to. Call of Duty Classic is the wheel. If you're a curmudgeon that can't stand dated graphics and gameplay you may want to skip this one. However, if you've never played the original, or just want to re-live the experience, this is a great opportunity to see where it all came from.
Call of Duty Classic is a faithful retelling of the same story you've all heard a million times, but it deserves attention because really it's the one that wrote the book in the first place.