Originally Posted by brapicoco
OT: what exactly is gpu overclock? and we have fast roms right now so unlocking bootloader is not necessary right? plus unlocking it will not enable synaptics to have real DT
OC GPU means that you overclock the Graphics Processing Unit of your phone (Adreno 200). This means faster graphics loading and other good stuff mainly to do with gaming.
As I said this is a preparatory step to unlock your bootloader in advance so that when a custom kernel comes, you don't have to do anything other than to flash kernel.
As for benefits, it can be found at the bottom of first post
No, it doesn't. As blagus mentioned, sim lock is stored in TA (Trim Area) Misc, modifying semcboot will not affect your sim lock. As I mentioned in first post, if your phone is sim unlocked this will restore your sim lock!
Benefits of unlocking bootloader can be found in first post (near the bottom).
Probably, seeing as X10 mini and mini pro already have their custom kernels.
Custom kernels allow for full support with custom roms