I also have a laptop with a USB stick DTV tuner that works great, this is a very good solution since it has a pretty big screen compared to a portable TV.
I just gave up and bought a new portable TV at Walmart a few months ago. It uses less power than a combo CTR analog TV and converter and it's way smaller. It does have some drawbacks: it's batteries are internal rechargeable, not standard cells that can be replaced when they die or run out (battery life is about 2.5 hours). It also doesn't have a 12v adapter, since you can't use standard DTV while moving, they didn't fee they needed to include one. Luckily, I have a car adapter I can use for it. It also doesn't have any other input except the antenna coax connector. I'm sure there are models that have better features than mine does, but it was on sale on Black Friday.
You can find several of them at Amazon for under $100 HERE:Portable DTV
Beware: all those little bitty antennas that come with portable TVs and USB tuner sticks are useless unless you live in a place with strong signals. Get yourself a better antenna.
There is a new standard for MOBILE dtv, that can be used while moving. You may want to wait until more mobile dtv devices are available (maybe even in smart cell phones, but don't hold your breath!) Maybe other members here can give you some advice about what mobile DTV devices ARE available now.