I came across these inflatable snowshoes today in my net wanderings. If this had appeared on April 1st I might have thought it was an April Fool's Day joke... but it does seem that they are real! They are still under development, but for emergency use, or in a place where you don't expect snow but it can happen, they have potential.
No specs on weight or packed size yet, but they are certainly going to pack smaller than normal snowshoes.
Cheers,
Alliecat