It only blocks if they are competitors---not blocking in other industries is good for innovation
Seaman 15 (Seaman, Christopher B., Permanent Injunctions in Patent Litigation After eBay: An Empirical Study (August 17, 2015). 101 Iowa Law Review 1949 (2016), Washington & Lee Legal Studies Paper No. 2015, Available at SSRN: https://ssrn.com/abstract=2632834 or http://dx.doi.org/10.2139/ssrn.2632834)
Another factor discussed in the existing literature is the relationship between the litigants.139 When the parties-in-suit are competitors, a permanent injunction typically issues.140 Indeed, the Federal Circuit has gone so far as to declare that the “essential attribute of a patent grant is that it provides a right to exclude competitors from infringing the patent.”141 According to one commentator, “[i]f the parties can fairly be described as direct competitors, the first two factors” of the eBay test—irreparable injury and absence of an adequate remedy at law—“will weigh heavily in favor of the [patentee].”142 For instance, the types of competition-related harms that courts have found sufficient to demonstrate an irreparable injury include loss of market share, loss of goodwill among customers, and price erosion.143 In contrast, “district courts appear to have consistently denied permanent injunctions in cases where . . . the infringer and patent holder were not competitors.”144