My two cents on the market for this is:
If it is a non-technical customer you will be lucky to get them to pay for a lot of features as they don't care or don't understand the benefit. Also by nature they are likely to find it difficult to understand a number of useful features eg. NAS, VPNs and/or multiple DNSs. I think they would even find it hard to use a bandwidth monitoring tool given that most people don't know what an ip address, a mac address or the difference between ipv4 and ipv6 and the utility of NAT.
If telecom are planning to sell to geeks, we probably want features which I believe are well outside the ability of Telecom staff to maintain or develop to a solid standard. Therefore I think the idea about using DD-WRT or Tomato is good, but given most of us know how to get this and which routers are compatible, unless the hardware is really good, most of us aren't going to be interested.
I suppose the only group left are those in the middle who know you might be able to obtain and store your media centrally somehow, but don't know how to do it. Telecom doesn't really have any experience in delivering this sort of product, so I fail to see how they could make something that is both easy to use and powerful enough to deliver what is needed to do this, given the difficulty in doing this well faced by most of us (need I mention EPGs?).
That being said this has kinda been a kinda fun brain teaser.