Do you think he can play as a striker?
It has been rumored that Wenger wants to use him as a center forward but I just don't see him turning into that. They still need a new striker IMO.
I don't think it'd be his most effective position, but we must be careful how we define "centre forward". In the tradition number 9 sense? No chance. But, what Arsenals attacking players have are versatility and true footballing intelligence. They can all take up pretty much any position along the front 3 behind a striker with the exception of Walcott, who himself could probably play 3/4. If they gel, there is no reason why he can't form part of a devastating front 4 who constantly rotate and take up positions across the front. However, there are issues with that:
1) they still would need some organisation, and on a bad day it wouldn't work.
2) when you do that, you have to accept your defensive strength from those front 4 will be next to nil. They would need a world class midfield combination to cope, and I don't think they have that. Ramsey is too aggressive, flamini isn't amazing, and Wilshere seems to have faded.
On the other hand, they still have Giroud to mix it up.
Overall I wouldn't say it's the best move. They'd be better of playing off Giroud as a guy who holds up play, having Ozil in behind and Sanchez making runs. But that might place too much reliance on Sanchez to run in behind. As good a player as Cazorla is, having Ox/Walcott on the other flank would be more devastating than having Cazorla there, who wouldn't run in behind as much.
I think it COULD work, but overall don't see the point given their circumstances or given they have better combinations.