Eset Router/partner router

[SBrown 4]

I remember about 3 or 4 years ago avast started this idea what if antivirus company starts producing router with their security solution. After i saw bitdefender tried this idea too (Bitdefender box 1 and 2) but they stopped producing it and they teamed up with netgear. I think it could be a good idea (This is my opinion). I read about that firewall is not enough because dos/ddos and other attacks can't be prevented by firewall or is it very hard and the solid firewalls are what can stop these attacks. If this is not a good idea, please write it why not because i like to learn new things. Thanks!