This PC World article says that suppliers of Digital Enhanced Cordless Telecommunications (DECT) -- cordless phones -- have agreed through their association to build devices that can easily support VoIP and related applications and services.
The ability for callers to move around freely is an important VoIP feature, since it's something to which people are accustomed. Indeed, it's hard to think that the VoIP industry would be viable if users had to be connected by wires to the endpoint, be it a phone or PC. Not offering cordless phones would be a problem that would quickly threaten the business VoIP market to which the consumer sector is deeply linked.
The support from Linksys and others suggests that the standard, which was developed by the DECT Forum in association with the European Telecommunications Standards Institute, is headed for America.
Indeed, there already appears to be action in this realm. For instance, Yahoo and Linksys and Uniden recently released cordless VoIP phones. This is an important -- albeit not highly publicized -- area.