So as this Dash woot! winds down, I'm gonna clearly state the main points I have for the Dash vs. using a cheap tablet (Cruz) instead...
I think there is no argument, the Dash screen is much nicer. So my main point for the Dash is the physical form factor.
If I tried to use the Cruz and stand as an Alarm clock, I would grab it by the tablet half asleep, the dock would fall off while I pick it up toward me, it would never be at the right angle, I wouldn't be able to easily reposition it on my headboard without moving the dock (I can do this with the Dash without evening looking). I would never be able to get it back into the dock when half asleep, etc. The Dash is easy for me to reach back and fumble for when it goes off in the morning.
The Dash I just pick up, do what I need, then lay it back down. Its stable, fits just about anywhere on my headboard, can easily be laid on my bed as I or even on me to watch videos as I fall asleep. If I move around in the bed I don't have to struggle to get it back in a good position. I can only imagine trying to balance that Cruz on my bed and keep it in a decent position and angle as I move about into another position. This is why I don't use my much nicer (than the cruz) tablet instead of my Dash...
So, the best things about the Dash is the 'Alarm Clock' form factor and screen. If someone wants a cheap tablet, then go for the Cruz. If someone want's a alarm clock on steroids / video streaming device combo, the Dash is pretty much cream of the crop.
Oh, and one last thing, the speakers on the Dash are better than any low end tablet I've seen (and many higher end ones).