The colors are more colorful, the special effects are more special, the explosions are more explosive, The Force is more forceful and the jawas mumble more clearly.
Purists have nothing to fear, however.
The extensive cinematic facelift has not soiled or compromised the integrity of the original. Princess Leia's hair buns have not become digitally-enhanced cornrows. Droids find Boy instead. Boy helps Droids get to Hermit. Hermit teaches boy secret religion.