Basically he did not have his hollowpowers the first time when Rukia gave him her powers...
back then the shinigamipowers were kinda borrowed or a kind of activation for his true powers.
He gained his hollowpoweres when he trained with the Hadguy... damn forgot his name again... bleach long timed not read well :-\
Now his poweres are kinda borrowed again and I kinda doubt he gets his hollowpoweres back, cos the last inch of hollowpower got taken away by Ginjo. I think now Ichigo is a full shinigami, thats why he got a new look. It could also be possible that now he is a stronger shinigami, as there are no hollowpoweres that fight the shinigami poweres within him. But well, being full shinigami now doesnt mean hollow ichigo will be gone for ever....
To be honestly, i wouldnt mind hollow Ichigo being gone. It would be a sign of maturity that hollow ichigo is gone. No beast inside him anymore that kills without thinking.