1440p is theoretically the next level of HDTV resolution beyond 1080p. Currently there are no definitive plans in place to upgrade to this resolution. Blu-ray has the storage space to handle this resolution, but modern displays can't accept it, and cable/satellite providers certainly don't have the bandwidth to broadcast it.

Presuming the same 16x9 aspect ratio as current HD, 1440p would have a resolution of 2560x1440, an over 50% improvement in resolution over 1080p.

Also check out 2k and 4k for glimpses at what the future may hold in terms of resolution at home or in the theater.