I think it'll have a tough job competing with bc.info as that is already a pretty solid wallet especially for an online one. Thjough it does seem more like a traditional wallet:
In this sense, Lee created ArcBit in such a way that all private keys stay on the clients device; unlike Blockchain.info, which stores encrypted copy of the wallet on their servers.
"So you can think of ArcBit as a true bitcoin wallet, whereas Blockchain.info is a safety deposit box for your bitcoins - where the user has the key but Blockchain.info [doesn't] -and Coinbase is the bank for your bitcoins," he explained.