Well, I know you said this is "up for debate", but really, any form of digital currency issued by the Federal Reserve wouldn't be anything any consumer would want.
The "Federal Reserve" is a federation of privately-owned banks authorized by the US Government as the banking monopoly that is permitted to issue its currency. The Federal Reserve is the bank that US government borrows from, and the private banks that issue the funds to the US Government make profit off of the loan. Excess profits (outside of legally stated limits) get returned to the tax payers. The saying goes -- there "Federal Reserve" is as "Federal" as "Federal Express (FedEx)".
Understanding this, the banks that make up the Federal Reserve are the banks that issue credit cards and make money off of financial transfers. The Federal Reserve is not going to do anything to endanger the profits of its member banks. So while the Federal Reserve could create a crypto currency, assume it would be laden with an oppressive fee structure, issued and collected by its member banks. Every bank covered by the FDIC is a member bank / Federal Reserve.
The only things consumers could get out of this is convenience. Banks are hungry for profits, so there would be fees, there would be advanced currency tracking (think FBI / NSA), there would be no privacy, there would be electronic fraud that may or may not be able to be reversed.