It looks as though, to make the framework taller to support keys with travel, you'd need an entirely different case -- but so long as the mountpoints for everything were otherwise the same it seems like it wouldn't be a radical rework of the product.

One can imagine a double thickness framework with either somewhat bigger battery and mechanical keys or super huge battery and the smaller keys; and of course more (or at least larger) expansion cards.

But of course the idea for something is worthless - it's the execution that matters. I hope they succeed enough to be able to expand their portfolio to more niche markets.