After snapping up e-book retailer Anobii and music company Global Media Vault, the UK supermarket is now partnering with Rovi for a digital video service. Launching later in the year, it'll offer video-on-demand and downloadable copies of "major" film and TV titles, available the same time the discs are available in store. It'll initially be limited to computers, before rolling out to Smart TVs, connected Blu-Ray players, smartphones and consoles.