Regular, nonfoil editions of Tenth Edition cards help new players learn to play by spelling out the meanings of abilities like flying, trample and shroud. But if you know these terms already, you can escape all that reminder text by collecting foil versions of those cards. Foil cards in Tenth have no reminder text.
In some cases, this allows more room for flavor text. Here are some samples of cards that gained significant real estate for some juicy new flavor text—flavor that wouldn't have fit on the nonfoil versions, what with all the reminding going on.
In some cases, the lack of reminder text just served to give more room for awesome.
Magic Game Day is Saturday, and Tenth Edition is awesome. If you weren't going already, then for the love of Garfield, go.