just like most upgrades
it will be faster
better graphics
less hack proof
if they are going to make the games 1 machine only i would assume the price of the actual console wont be much higher if at all over the ps3,
if they go to high parents wont buy them and x box will just undercut them and steal their customers.
most of the money they make is from games anyway, i cant see sony making the ability to play second hand games redundant unless the same thing is going to happen with its competitors.
as usual though they will bring out some fantastic titles to launch the system at the beginning so people see the improved graphics and think - wow - gotts buy that.
guess we better wait to find out.