No surprise about Atari games being included on this thing (it would have been shocking if they weren't!), but it is definitely a pleasant surprise that it will feature a trackball AND two spinners! That will make head-to-head Warlords a real pleasure to play on this thing.
As for Tron, it's quite possible to play it without a joystick-mounted fire button... I've been playing that way for years on my homemade control panel. It's a tad awkward to work the spinner, joystick and a panel-mounted fire button simultaneously, but it's certainly playable.
As for the shape of this thing, I'm a tad surprised it hasn't been finalized this late in the process. I'd vote for something that looks like an old arcade cabinet, but I would understand if some corners needed to be cut to make it more affordable. Just so long as it's sufficiently sturdy!
This certainly is shaping up to be to the best fully legal and affordable multi-game arcade machine yet offered to the public. I'm really hoping it is a big success!