I happen to have performed this piece and know that both parts are fraught with technical problems. I find this amusing that the cellist plays the violin as he would a cello, unfortunately, as a violinist, it is highly unlikely that I will play the cello the way that I hold the violin.
There are other attempts at duets like these. Some instrumentalists like to play both parts of the Bach double violin concerto (Heifetz) or the Sarasate Navarra (Rosand), however the most interesting one is probably the recording that Artur Grumiaux made of himself playing the violin AND the piano part to a Mozart and a Brahms Sonata. Grumiaux was a great violinist and a very good pianist. The story goes that he excelled at both as a youth and his grandfather made the decision that he would study the violin at the conservatoire since there were lots of pianists.
The piano worlds' loss is the violin worlds' gain.
Then of course there is Ethan Winer who came up with this ditty.
maybe it is a cellist thing