I am in Flight from JFK-SFO on AA and using Gogo Inflight internet. With the promotion code they hand out, it only costs me less than $10 for entire Transcont flight. The speed is fast enough to do anything. Serivce is avaliable on flight JFK-SFO/LAX/MIA.
Delta will offer this service soon and Virgin America already launched service on most route.
With no Powerports, no internet service, no dish network TV and massive increase in award redemption level, it's hard to keep UA anymore.
Although UA are changing some of their International Business seats to 180 lie flat will be eventually on all flights, services to mainland China still use Old 747.
One more thing to add. although UA has elite bonus, it is only for travel on UA, US and LH transatlantic flights. DL, NW elite earn elite bonus on all Sky team partner flights, and AA elite earn bonus on almost all one world partners except BA and JL.