There is no limit of what you can do with instruments. Here are some examples of guitar trios that bend the conceptions of the genre, from classical stuff to intergallactic destruction, deconstruction and reconstruction.
All four albums come from a clear rejection of society and music as we know them, demonstrating anger, disappointment, frustration, ... leading to violence and destruction, while at the same time using the musical tools as we know them today though differently, with the only endeavour that out of the chaos something new may arise, something that's not yet defined, but something for which this music already gives some options and hints, no plan, just hope ....
Raphael Rogiński - Bach Bleach (Multikulti, 2009)
Eyal Maoz's Edom - Hope And Destruction (Tzadik, 2009)
Ahleuchatistas - Of The Body Prone (Tzadik, 2009)
N.E.W. - Newtoons (Bo’ Weavil, 2009)
These three artists do not really fit in this list, as it's possibly the only real jazz album. Steve Noble on drums, John Edwards on bass, and Alex Ward on electric guitar move us into intergalactic environments, destroying powerfully and willfully all musical idioms, yet the debris that's left actually is cosmic rubble from outer space, as you gradually come to notice, and especially the last track is magnificent in its changing moods and styles.