New Cisco Flip device offers 16GB to store four hours of HD video
Barnes & Noble seeks wider distribution to take on Apple iPad, other devices
Much depends on pricing and user acceptance of a novel device
HTC and Lenovo may bid, but there could be others
Both devices have touch screens and physical keyboards and will be available in May
The list of rivals to Apple's iPad is growing
Analysts like the changes, with few exceptions
But next generation of schoolchildren will demand access to touch systems in 10 to 15 years
While Apple's tablet has a Cisco VPN, it's not widely known
Focus is to appeal to the young social-networking crowd
