Can only offer some thoughts:

1. For watching on a Mobile Phone, you'll need a pretty expensive data option and UMTS or so I guess, can't seem y mobile phone streaming TV over the internet.

2. If you want to use it to watch in HD on your Laptop when you're away you'll need a WLAN for your laptop(or connect using your handy in combination with thwe laptop but that results in lower bandwidth, hardly sufficient for HD) and you will need a hell of a fast upload at home so the slingbox can upload at sufficient speed.

That are the problems I see, if you're rich enough to afford some 16MBit upload or so(maybe 3MBit for normal TV?) and a similarly fast download for your Laptop, you can probably enjoy mobile HDTV on your laptop, whenever a cellphone is included I can only hope you have a sufficient data option or else you'll pay a whole lot of money for every minute you watch, at least with my provider, alternatively a WLAN phone might work.