No the selection screen will not go away. The BCD is the boot loader of Windows from Vista onward. Just like the boot.ini file is what loaded Windows from the early 3.1 days till XP. EasyBCD is just what it sounds like. An Easy way to operate with the BCD. Go ahead and take a look at the bcdedit screen and see if you really want to mess with that over what EasyBCD offers.
EasyBCD is a graphical user interface for the BCD and allows simplicity. The BCD is there to stay no matter if EasyBCD is there or not.
To get rid of the choice screen, you will have to modify the BCD to get rid of the Windows 8 entry. I would suggest EasyBCD, once you see the bcdedit you will know why.