Frankly I have given up on ATtiny85 chips. I will use the chips I have bought, but I don't see myself buying more. For me, the big issue is the various incompatibilities with the larger Arduino world (particularly no Serial support and having to use TinyWireM.h instead of Wire.h, but I want to start playing with Servos, and that is another sore spot in ATtiny85 support). The Linux releases from digistump seem to be almost a year old, so it seems to have been frozen in time.
On a whim, I bought 2 digispark pro's, oled shield, lipo shield, and bluetooth shield. I will see how the water is when I get the chips and actually use the digistump version of the IDE. The retail price hasn't been announced yet, but I suspect it will have a hard time to compete against the various 32u4 chips coming out (pololu astar, upcoming adafruit pro trinket) and the various 328p nano clones. The Pro micro clones aren't interesting to me, since they don't include USB serial support, but the Leonardo/Nano clones that do include the USB support without additional hardware are interesting.