It'd be useful (assuming it works as advertised) to me for things like trips to visit relatives where I'd like to show off this or that game but my 10-year-old laptop isn't up to the challenge.
Of course, it might work well at my Dad's house, but my Grandpa who steadfastly refuses to get any kind of TV or Internet access package (he uses rabbit ears for TV. RABBIT EARS), maybe not so much.