I'm really looking forward to this especially as a replacement to Retron 5, I simply need a NES emulator box to be able to play real carts with savestates... but I'm also highly highly suspicious of this. Having been following this via the appropriate Atariage thread (which is also highly critical of the device), it just doesn't look too good how the Polymega crew has not only totally misled the audiences about the technology they had (how their "hybrid emulation" and fgpa promise just turned into regular emulation), as well as sketchy about their funding model (they basically took preorders a year ago with a kickstarter type setup, with no liability) and now they've been promising release since march this year and I still haven't heard anything concrete about shipping..
Anyhoo, I'll probably buy it after there's actually a retailer selling a real product, not a preorder, and after I see a good review from Digital Foundry and My Life in Gaming. Also, the light gun support would be awesome if they can really pull that off!
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It's been a long time since I realized, I'm not building a great collection, but a great library.