First-order effects

• In each of the eight launch markets, Sprint becomes the only carrier selling true mobile broadband, giving it a temporary speed monopoly it can market against Verizon and AT&T's 3G networks.
• Device makers building WiMax-capable handsets and modems gain their first real addressable audience beyond the handful of existing cities, de-risking their Sprint-specific hardware bets.

Second-order effects

• A competing wireless broadband standard was already encroaching on WiMax's position as of late 2009, so every market Sprint lights up raises the pressure on LTE-backers to announce comparable launch timelines rather than cede the '4G first' framing.
• If the rumored Walmart build-out partnership proves real, mass-retail distribution would put Sprint's network expansion in front of prepaid and budget buyers — a segment the carrier's turnaround plan has leaned on via exclusives like the Palm Pre — though that deal remains unconfirmed.

Third-order effects

• WiMax's stated trajectory of serving more than 80 U.S. cities by the end of 2010, if met, would make raw data speed the primary axis of U.S. carrier competition and force a capital-spending arms race regardless of which standard ultimately wins.
• An eight-market year also sets up the credibility test for '4G' itself: if marketing outruns coverage, carriers' generational labels risk becoming branding exercises rather than engineering facts.