SunRocket's 'O' Ring?

Some thought provoking blog - reasons for SunRockets demise. Althought nearly convincing, are the likes of SunRocket's at risk or is this portent of a larger problem. Are primary line owners aka incumbents the sole monoplizers of this market - or are they at risk too? Wireless companies are an exception and immune to this risk since they are part of insulated, nascent and ever growing market. But not so for the primary line phone companies. The play with bundles on triple play cannot hide for long the diminishing ARPUs and ever increasing acquisition costs. The looming question: Whether the larger phone companies can absorb this for long?
http://greatfallsventures.wordpress.com/2007/07/19/sunrocket-did-not-crash-due-to-a-management-failure-it-was-way-more-fundamental-than-that/