After watching the teardown of the other Rigol HD scopes by Dave and now this low cost HD scope, think Rigol should be complemented on taking the risk of developing a custom chip set! We know what's involved in this undertaking, and even if Rigol subcontracted this out (likely) they still had an enormous investment up front with enormous risks.
Think we are seeing fruits of Rigol's custom chip set investments, and for these to prove out financially they must utilize a very large number of these chip sets. Here we're likely talking 100,000 or more of these chip sets, and thus they need to find many products to utilize such, one of which is this new low cost HD scope!! From what we know Rigol is the only second tier OEM to support a custom DSO/MSO chip set, putting them on par with Keysight, Tektronix and LeCroy (maybe R&S) regarding such.
Hopefully Rigol will do an equally good job as they've done with the custom chip set with the firmware and UI. So far the UI is very attractive but seems riddled with bugs in the early releases, which many have indicated may have been released a little too early.
Anyway, interesting times for us lab rats
Best,