World War Z and I Am Legend were pretty terrible, despite amazing source material.
But 28 Days Later pretty much reinvented the zombie genre singlehandedly. Amazing Flick. Kicked off a zombie and post-apocalyptic boom in film and television (which unfortunately resutled in weak flicks like World War Z and I Am Legend). Famous for pretty much inventing the "fast zombie".
Danny Boyle is a great director in general (Trainspotting, 28 Days Later, Slumdog Millionaire, The Beach, 127 Hours, etc.).
The sequel 28 Weeks Later was pretty medicore tho. Hopefully this one is better. Trailer looks great at least.