Emirikol said:
Sorry, I only read at the 3.5 level

In all seriousness, I do ask if the Rogue really can stand on his own anymore or if he's been replaced essentially by spells and crap. Was there an actual question in there?
Jay
Yes, he can.
Basically, you can have a Rogue, or you can have an Eladrin (Blink-Elf) Wizard. If you have the Rogue, you have someone that is capable of dealing damage where it hurts (because he is the striker) and who can pick locks, disarm traps (so that everyone can get by them) or trick the stupid troll in believing the group already payed his debt.
With the Eladrin Wizard, you have someone that is capable of blocking your enemies movements and deal some damage to multiple foes. He can also also try to "blink" through a door try to open it from the other side or hop over a trap (hopefully the other characters no how to get by), and he can try to charm the troll.
So, one part of the Rogues ability, the Eladrin Wizard just can't do. A part of the Eladrin Wizad the Rogue just can't do. But both parts are good to have, and you don't really want to miss them if given a choice.
It might be important to see that being able to pick locks or disarm traps isn't the defining role of a Rogue. These abilities are still important, because they distinguish him from a Ranger or Warlock, who might have the same role, but do it differently, and can't do his "secondary things". No class can entirely replace the other abilities. There are still multiple ways to cover all abilities, and you don't need a Rogue, if you have a wizard that supplies the thiefery skills and a Ranger that covers the "striker" part.
The important thing is: There are multiple ways to get to the same goal, each of them is valid, and no way invalidates the other.