It strikes me that the Rhythm seems like Novation’s response to the Model:Samples - which might be a nice alternative however if the price is accurate and there aren’t some pretty exciting ‘under the hood’ options that aren’t obvious from the front panel then it’s going to be hard to compete with the M:S.
Also, and maybe it’s just me, but if you’ve got a limited number of knobs on a device, why would you dedicate one to filter slope? Still Novation have a reputation for packing plenty into (and updating) their firmware so be interesting to see the full reveal…