There should be a standard docking solution to hook phones up to keyboards/monitors/tvs/etc, not bluetooth which will never carry video efficiently.
Sprint's current 4g isn't all that fast, latency is better than 3g, actual speeds really aren't though.
Technically, true 4g is a long ways off. According to wikipedia, 4g starts at 100Mbits/s, about 12.5MB/s. Heh, that's LAN speeds from a decade ago. None of the successor technologies are anywhere near that, but I guess marketing can call whatever they want 4g.