Flipboard is just a twitter reader. It turns your twitter feed into a nice visualized form. It can do it with Facebook too. In general when people post links on twitter, it turns into an article form on Flipboard.
So in Flipboard's news or tech feeds, all it is, is a Flipboard twitter account retweeting stuff from CNN, Engadget, etc.
I'm not sure how Google currents works, but the end result is the same. Honestly Google Current's layout was trash until recently. I like to read tech, sports, news, by the category. I don't like having to pick between my sources 1 by 1, which is what Current sforces me to do. In the end I have like 20 sites, like Engadget, Mashable, TheVerge, TechCrunch, etc. just to hit my tech. Instead I can get it all in 1 click on Flipboard. I can still choose specific sites if I want by adding the individual site in Flipboard.
Overall, Flipboard for Android tablets is not complete. I played around for 20 minutes and I found some errors in it. For example, sites that aren't Flipboard friendly load in its native browser, which is slow as crap (like 15 fps scrolling on my Nexus 10), and not only that don't render properly. Having to scroll through the site when its so easy to accidentally flip to the next article is annoying. I kinda forget how it was on the iPad but I know it was done a lot better.
It's just version 1.0 for tablets anyway, so I'm sure they have a long way to go to iron out bugs.