Hi Lionstracs
1. Disc streaming and Giga sampler is not new technology, it came out in the late 90s early 2000s.
2. Wersi has had the option to use Gigasamples since OAS 4, (2002) however it only came standard with the Giga Piano, as most customers preferred to use the disc streaming technology of Steinberg and Native Instruments.
3. Sample loading time in a PC is not determined by the OS, but by the speed at which the hard disk can transfer the data.
4. Disc streaming does not play the whole sound off the hard disk, part of it is loaded into ram so that when you press a key it plays the part in ram first, giving the hard disk time to supply the rest of the sample.
5. If you look at the music software industry you will find that it is slowly moving away from sampling and moving towards sound modelling. (Due to increasing computer power)

Hi Adimatis
1. All the Rom, Ram and hard disks included with hardware instruments come from the computer industry, (Keyboard manufactures do not make any of their own) however as it takes between 2 � 3 yrs to develop a new board (The hardware is finalised first) the technology used in them will always be old. (This is the reason the T2 only has USB 1 and uses PC100 Ram, as this was the most common at the time)
2. Try playing a Graded Hammer Action Keyboard controlling a sampled piano VST like Ivory, NI Acoustic Piano etc, and then say samples cannot produce the interactions of a genuine piano. (The reason the samples are large (2-3 GB) is because the nuances you mention are also sampled.
3. Sound modelled pianos are now starting to become available, which means that instead of actually recording the sound in a sample, the sound is produced in the same way as a real piano, the main difference being that in a real piano the sound is produced by strings, whereas in a computer it is produced by virtual strings. (Therefore a large amount of memory is not required, just a fast CPU)
Hope the above clarifies a few things
Enjoy whatever you play

Bill