Honestly, I think the tablet market is just emerging now. Apple basically owns/owned it up to now. Others are coming on board fast. Some too fast, pushing out product with little support, inferior, or just over-priced. It isn't even a given if there is a real market for Wi-Fi only or Gx tablets (I'm not taking about business uses that are 'bundled' apps and h/w types either). Some of it is novelty (the market) and once saturated it is non-growth.
Xoom has been banged already as too pricey to go against iPad's. It is not in the same league and more costly. If prices come down on air connections, now monthly and some have limits, they could be more attractive.
However, some networks are getting overloaded with phones, iPod's, and iPads. The larger the screen, more data comes down as movies are clearly better seen on iPad's than other ixxxxx devices. Add to that other tablets now hitting the airwaves and one wonders who has the capacity to deliver?
Do you really think 20 people can sit at Starbuck's, buy a cup of coffee and watch NetFlix on an iPad on their network? I'd be surprised, but if the bandwidth is there, I guess they could?
Orlando for 2 years was wireless downtown. A company put all the repeaters in and figured it would make a killing on extra services (faster, other options, etc.) Well, the contract was up and they are pulling out. It cost them $2,700/mo. to run it and they reaped on average only $100 in services... go figure...