Interesting. IMO this kit should be a high priority for Samsung TV division, based on its success (or failure) the TV sales can skyrocket or sink. Personally I believe the marketing campaign has been a little overhyped in terms of making people believe that the kit will pretty much make the whole 2012 TV work just like the new 2013 one. While it sounds great I really doubt that will happen, especially when it comes to PQ and other features non Smart Hub related.
As for speed, in my case the present internet speed is pretty good, I can stream HD video online with no issues or hiccups. One thing I have had issues with is streaming videos from my laptop or the Samsing Note II via All-share. It is choppy and I hope the added processing power will fix this. Also the use of the external keyboard/mouse pad, I sure hope they can extend that to apps as well, not sure if the kit in itself can actually do that, or if it is a software issue.
On top of these, people need to understand that a quad core on a kit like this is not to be compared with a quadcore running on a laptop machine (or desktop), to put it that way. I have the Samsung Note II Smart Phone with quad core CPU, however it is noticeably slower than my quad core laptop. We're talking a different class CPU all together, still quad core but with limitations caused mostly by the size (and in Smart Phone case, the power as well).