Conclusion: If you are in the middle of amassing a big Blu-ray collection, it would be nice to be able to play those discs almost anywhere. The DMP-B100 offers that convenience, and a higher quality image than any portable DVD player on the market -- but that's about it. Considering the $499 asking price ($399 street price), we'd expect people to buy this as a main player, with the intent to take it on the road for portable viewing and plug it into a larger set and home theater rig...
Pros: Blu-ray on the road!, Displays a very nice high quality image, Speedy load times
Cons: High price, No network connection, No HDMI or other way to hook to an external display, Internal speaker could use a boost
Summary: The Panasonic DMP-B100 is the cheapest way to watch your Blu-ray movies on the go, but other portable media options, like an iPad or Blu-ray-equipped laptop, are more attractive.
Pros: Lets you watch your Blu-ray collection on the go, SDXC card slot, More than three hours of battery life, Slightly better image quality than portable DVD players
Cons: Visual advantages of Blu-ray are largely lost on small screen, No HDMI output, Other portable video options are more attractive, Only one headphone jack, No internet connectivity, MPEG-4 playback is dicey, Difficult remote control