As if HDTV wasn't enough, enter Japanese Super Hi-Vision, coming in ~2015
With its 33 megapixel (7,680 x 4,320) resolution and 22.2 channel surround sound, challenges so far have included building a camera that can record it, and equipment to transfer the 24Gbps uncompressed stream.
If those numbers boggle the mind, consider that they should. The proposed resolution is ginormous
next to HDTV's 1080p (dark blue versus light blue):
Certainly, we would hope that technology will be much further along in 2015, but 24Gbps is an awful lot of throughput. Consider it this way: to get that sort of performance out of current consumer technology - and we're speaking very theoretically here, under optimal conditions that never exist in the real world - you'd need ~4800 cable modems operating at their maximum down stream rate of 5Mbps to keep up with one Super Hi-Vision stream.
To take it one step further, your average two hour movie would be roughly 5760GB in size, requiring the equivalent of 115 Blu-ray discs (50GB) for storage.