This is from Alesis, well known in the audio world. I have an Alesis mixer and some audio processors from them, very good electronics.
I started recording first with a 4 track 10" reel 15 IPS Teac tape deck and it recorded REALLY well! Then a PC with outboard mixers and I/O's and such. Then I ported the recording to a laptop, mixer, I/O, mikes, mike stand, cables, earphones and software and that was that.
Now the same thing can be ported to a tablet! Probably 24 bit 96K recording capability, will see when the spec sheet comes out.
The thing about all that is you can do recording, mixdown, editing and all on the tablet.
The only thing left is an output recording medium. My laptop has a CD burner built in so you could go from raw audio to mixdown to final editing to a CD all in the laptop with such software paks as Cakewalk Sonar, which has a BUNCH of processors, reverb, echo, flange, EQ and so forth built in and then WaveLab which does the final mixdown and post production final editing and then to the CD burner.
So the tablet is not the final answer, it still has to go back to the studio to finish up but for portability, it is hard to beat because of the software available that you can't get with the hand held recorders.
On the other hand, if the tablet has a USB port, you can do a final mix to a flash drive and that might be the next wave in audio playback. My car has a flash drive port.