Since the focus of a 4E rogue is to be an effective melee striker, the wizard in no way steps on the rogue's toes. In earlier editions the rogue role was as a scout, lockpicker, second story man, ect. and magic could accomplish a lot of that. The "specialist" nature of the rogue has changed and now those types of skills can be spread throughout the party. A wizard opening locks, levitating, and other such things no longer replaces a rogue because those things are not the primary rogue functions.