The 700 MHz spectrum, and in particular the C block that Verizon holds and is under open access rules is just a really good piece of spectrum that can reach quite far and get through walls easily, but it's all a matter of how Verizon and AT&T (who also picked up a decent amount of spectrum, though not the C block) uses it.
They're planning to use it for their 4G Long Term Evolution network, and the technology for that looks like it's going to be OFDM for the downlink and SC-FDMA for the uplink, I haven't done any research on those or EPS (Evolved Packet System), E-UTRAN (Evolved UTRAN), or EPC (Evolved Packet Core) yet though as I just found out about it this morning and haven't even confirmed it yet.
Anyway, HSOPA (a preliminary standard to LTE or whatever the final name ends up being) is capable of 100 Mbps down and 50 Mbps up, though it's still limited by the base connection to the tower so actual user speeds (and throughput) will probably end up being slower.
In other words, it should function as both your primary connection (for your laptop and your mobile phone) and as your business line very very well. Verizon is planning their 4G rollout in 2010, AT&T has barely got 3G out the door but their rollout looks to be faster than I thought so maybe they can start their 4G network as well by around 2011 or 2012.
NTT DoCoMo unfortunately looks to be splitting from the LTE though I hoped whatever they were developing would become the LTE standard, their 4G technology is the first in the world to reach a 5 Gbps outdoor transmission.
Sebastian